Phase-Field Modeling of Spinodal Decomposition in Fe-Cr-Co Alloy under Continuous Temperature-changing Conditions

Yuheng Liu, Masayuki Okugawa, Kenji Saito, Daichi Izumikawa, Chuanqi Zhu, Yusuke Seguchi, Yuichiro Koizumi

ISIJ International　2023/12/31　Research paper (scientific journal)

Fabrication and Process Monitoring of 316L Stainless Steel by Laser Powder Bed Fusion with μ-Helix Scanning Strategy and Narrow Scanning Line Intervals

Yuheng Liu, Kazufumi Nose, Masayuki Okugawa, Yuichiro Koizumi, Takayoshi Nakano

Materials Transactions　Vol. 64　No. 6　p. 1135-1142　2023/12/31　Research paper (scientific journal)

Modulated Structure Formation in Dislocation Cells in 316L Stainless Steel Fabricated by Laser Powder Bed Fusion

Fei Sun, Toshio Ogawa, Yoshitaka Adachi, Kazuhisa Sato, Shunya Takagi, Goro Miyamoto, Asuka Suzuki, Akinori Yamanaka, Nobuo Nakada, Takuya Ishimoto, Takayoshi Nakano, Yuichiro Koizumi

MATERIALS TRANSACTIONS　2023/12/31　Research paper (scientific journal)

Modification of grain boundary microstructure by controlling dissolution behavior of θ particles in Cr-containing hypereutectoid steel

Koji Yamamoto, Takemori Takayama, Yoritoshi Minamino, Yuichiro Koizumi, Toko Tokunaga, Koji Hagihara

Materials Characterization　Vol. 205　p. 113241-113241　2023/11/01　Research paper (scientific journal)

Martensitic Phase-Transforming Metamaterial: Concept and Model

Sosuke Kanegae, Masayuki Okugawa, Yuichiro Koizumi

Materials　2023/10/25　Research paper (scientific journal)

Fusion of Ni Plating on CP-Titanium by Electron Beam Single-Track Scanning: Toward a New Approach for Fabricating TiNi Self-Healing Shape Memory Coating

Lei Wang, Masayuki Okugawa, Hirokazu Konishi, Yuheng Liu, Yuichiro Koizumi, Takayoshi Nakano

Materials　Vol. 16　No. 15　2023/08/01　Research paper (scientific journal)

Big-volume SliceGAN for improving a synthetic 3D microstructure image of additive-manufactured TYPE 316L steel

Keiya Sugiura, Toshio Ogawa, Yoshitaka Adachi, Fei Sun, Asuka, Suzuki, Akinori Yamanaka, Nobuo Nakada, Takuya Ishimoto, Yuichiro Koizumi, Takayoshi Nakano

Journal of imaging　Vol. 9　No. 5　2023/04/01　Research paper (scientific journal)

Influences of growth front surfaces on the grain boundary development of multi-crystalline silicon during directional solidification: 2D/3D multi-phase-field study

Chuanqi Zhu, Yusuke Seguchi, Masayuki Okugawa, Chunwen Guo, Yuichiro Koizumi

Materialia　Vol. 27　2023/03/01　Research paper (scientific journal)

Si-addition contributes to overcoming the strength-ductility trade-off in high-entropy alloys

Daixiu Wei, Wu Gong, Tomohito Tsuru, Ivan Lobzenko, Xiaoqing Li, Stefanus Harjo, Takuro Kawasaki, Hyeon-Seok Do, Jae Wung Bae, Christian Wagner, Guillaume Laplanche, Yuichiro Koizumi, Hiroki Adachi, Kenta Aoyagi, Akihiko Chiba, Byeong-Joo Lee, Hyoung Seop Kim, Hidemi Kato

International Journal of Plasticity　Vol. 159　p. 103443-103443　2022/12/01　Research paper (scientific journal)

Digital Twin Science of Metal Powder Bed Fusion Additive Manufacturing and Creation of Materials by Superthermal Field ふぇらむ Vol.27(2022)No.12

2022/12/01　Research paper (scientific journal)

Manufacturing single crystals of pure nickel via selective laser melting with a flat-top laser beam

Dennis Edgard Jodi, Tomonori Kitashima, Yuichiro Koizumi, Takayoshi Nakano, Makoto Watanabe

Additive Manufacturing Letters　Vol. 3　p. 100066-100066　2022/12/01　Research paper (scientific journal)

Digital Twin Science of Metal Powder Bed Fusion Additive Manufacturing: A Selective Review of Simulations for Integrated Computational Materials Engineering and Science

Yuichiro Koizumi, Masayuki Okugawa

ISIJ International　Vol. 62　No. 11　p. 2183-2196　2022/11/01　Research paper (scientific journal)

Equiaxed grain formation by intrinsic heterogeneous nucleation via rapid heating and cooling in additive manufacturing of aluminum-silicon hypoeutectic alloy

Masayuki Okugawa, Yuta Ohigashi, Yuya Furishiro, Yuichiro Koizumi, Takayoshi Nakano

Journal of Alloys and Compounds　Vol. 919　p. 165812-165812　2022/10/01　Research paper (scientific journal)

Electrochemical Formation of Dy-Ni Alloys in a Molten Cesium Chloride System

Hirokazu Konishi, Tatsuya Takao, Tetsuo Oishi, Toshiyuki Nohira, Yuichiro Koizumi

ECS Transactions　Vol. 109　No. 14　p. 3-9　2022/09/30　Research paper (scientific journal)

Elucidating the effect of preheating temperature on melt pool morphology variation in Inconel 718 laser powder bed fusion via simulation and experiment

Qian Chen, Yunhao Zhao, Seth Strayer, Yufan Zhao, Kenta Aoyagi, Yuichiro Koizumi, Akihiko Chiba, Wei Xiong, Albert C. To

Additive Manufacturing　Vol. 37　p. 101642-101642　2020/11/01　Research paper (scientific journal)

Simulations of non-equilibrium and equilibrium segregation in nickel-based superalloy using modified scheil-gulliver and phase-field methods

Masayuki Okugawa, Daichi Izumikawa, Yuichiro Koizumi

Materials Transactions　Vol. 61　No. 11　p. 2072-2078　2020/10/02　Research paper (scientific journal)

Nano-scaled solidification microstructure characteristics in additively manufactured 316L stainless steel

Fei Sun, Yoshitaka Adachi, Kazuhisa Sato, Takuya Ishimoto, Takayoshi Nakano, Yuichiro Koizumi

Nano-scaled solidification microstructure characteristics in additively manufactured 316L stainless steel　2025/12/31　Research paper (international conference proceedings)

Impacts of excess vacancies on order-domain growth in D03 Fe3Al intermetallic phase

Masayuki Okugawa, Madoka Watanabe, Satoshi Ichikawa, Kazuhisa Sato, Yuheng Liu, Hiroyuki Y. Yasuda, Yuichiro Koizumi

Scripta Materialia　2025/10/01　Research paper (scientific journal)

NiTi coating formation on Ti for enhanced wear resistance utilizing electron-beam additive manufacturing technique

Lei Wang, Masayuki Okugawa, Yuheng Liu, Ken Cho, Hiroyuki Y. Yasuda, Takayoshi Nakano, Yuichiro Koizumi

Surfaces and Interfaces　2025/09/01　Research paper (scientific journal)

Multi-axed phase-transforming cellular material: A data-driven design and validation using finite-element method and machine learning

Masayuki Okugawa, Sosuke Kanegae, Yuichiro Koizumi

Extreme Mechanics Letters　2025/06/01　Research paper (scientific journal)

Raking and Fusing Behaviors during Fabrication of Multiple-layers in Powder Bed Fusion: An integrated discrete Element and computational thermal fluid Dynamics Study

Shuhei Mino, Masayuki Okugawa, Takayoshi Nakano, Yuichiro Koizumi

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 72　p. S1465-S1469　2025/03/15　Research paper (scientific journal)

Phase-separation induced dislocation-network cellular structures in Ti-Zr-Nb-Mo-Ta high-entropy alloy processed by laser powder bed fusion

Han Chen, Daisuke Egusa, Zehao Li, Taisuke Sasaki, Ryosuke Ozasa, Takuya Ishimoto, Masayuki Okugawa, Yuichiro Koizumi, Takayoshi Nakano, Eiji Abe

Additive Manufacturing　2025/03/01　Research paper (scientific journal)

Superimpositional design of crystallographic textures and macroscopic shapes via metal additive manufacturing—Game-change in component design

Takuya Ishimoto, Naotaka Morita, Ryosuke Ozasa, Aira Matsugaki, Ozkan Gokcekaya, Shota Higashino, Masakazu Tane, Tsuyoshi Mayama, Ken Cho, Hiroyuki Y. Yasuda, Masayuki Okugawa, Yuichiro Koizumi, Masato Yoshiya, Daisuke Egusa, Taisuke Sasaki, Eiji Abe, Hajime Kimizuka, Naoko Ikeo, Takayoshi Nakano

Acta Materialia　Vol. 286　p. 120709-120709　2025/03/01　Research paper (scientific journal)

Promoting the ordering of L1<inf>0</inf>-FeNi phase via chemical interactions with substrate: A molecular dynamics simulation study

Masayuki Okugawa, Dmitri V. Louzguine-Luzgin, Yuichiro Koizumi, Takeshi Nakanishi

Scripta Materialia　Vol. 255　2025/01/15　Research paper (scientific journal)

Laser additive manufacturing of a carbon-supersaturated β-Ti alloy for biomaterial application

Mingqi Dong, Yu Zhang, Weiwei Zhou, Peng Chen, Zhenxing Zhou, Hiroyasu Kanetaka, Takuya Ishimoto, Yuichiro Koizumi, Takayoshi Nakano, Naoyuki Nomura

Additive Manufacturing Letters　Vol. 11　2024/12/01　Research paper (scientific journal)

Quantitative revealing the solute segregation behavior at melt pool boundary in additively manufactured stainless steel using a novel processing method for precise positioning by HAADF-STEM

Fei Sun, Yoshitaka Adachi, Kazuhisa Sato, Takuya Ishimoto, Takayoshi Nakano, Yuichiro Koizumi

Materials Characterization　p. 114435-114435　2024/10/01　Research paper (scientific journal)

Fabrication and Process Monitoring of 316L Stainless Steel by Laser Powder Bed Fusion with µ–Helix Scanning Strategy and Narrow Scanning Line Intervals

Yuheng Liu, Kazufumi Nose, Masayuki Okugawa, Yuichiro Koizumi, Takayoshi Nakano

Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals　Vol. 88　No. 9　p. 190-197　2024/09/01　Research paper (scientific journal)

Initial Investigation of Reductive Gasification of Phosphorus Compounds

Hirokazu Konishi, Shimpei Fujiwara, Yuichiro Koizumi

Tetsu-to-Hagane　Vol. 108　No. 10　p. 721-727　2022/12/31　Research paper (scientific journal)

Raking Process for Powder Bed Fusion of Ti–6Al–4V Alloy Powder Analyzed by Discrete Element Method

Masayuki Okugawa, Yusuke Isono, Yuichiro Koizumi, Takayoshi Nakano

MATERIALS TRANSACTIONS　Vol. 64　No. 1　p. 37-43　2022/12/31　Research paper (scientific journal)

Thermally induced phase transforming cellular lattice driven by bimetal beams

Hayato Nagayama, Sosuke Kanegae, Masaki Hosoda, Masayuki Okugawa, Yuichiro Koizumi

MRS Advances　2022/09/08　Research paper (scientific journal)

Effect of Rapid Heating and Cooling Conditions on Microstructure Formation in Powder Bed Fusion of Al-Si Hypoeutectic Alloy: A Phase-Field Study

Masayuki Okugawa, Yuya Furushiro, Yuichiro Koizumi

Materials　2022/09/02　Research paper (scientific journal)

Spinodal Decomposition in Plastically Deformed Fe–Cr–Co Magnet Alloy

Hitomi Iwaizako, Masayuki Okugawa, Kenji Saito, Yuichiro Koizumi, Akihiko Chiba, Yuichi Tachiya, Manabu Ohnuma, Kingo Kuritani

ISIJ International　Vol. 62　No. 6　p. 1268-1274　2022/06/15　Research paper (scientific journal)

Raking process for Powder Bed Fusion of Ti-6Al-4V alloy Powder Analyzed by Discrete Element Method

Masayuki Okugawa, Yusuke Isono, Yuichiro Koizumi, Takayoshi Nakano

Journal of Japan Institute of Light Metals　Vol. 72　No. 6　p. 291-297　2022/06/15　Research paper (scientific journal)

Density, surface tension, and viscosity of Co-Cr-Mo melts measured using electrostatic levitation technique

Manabu Watanabe, Yuki Watanabe, Chihiro Koyama, Takehiko Ishikawa, Sayaka Imaizumi, Masayoshi Adachi, Makoto Ohtsuka, Akihiko Chiba, Yuichiro Koizumi, Hiroyuki Fukuyama

Thermochimica Acta　Vol. 710　2022/04/01　Research paper (scientific journal)

Thermophysical properties of liquid Co–Cr–Mo alloys measured by electromagnetic levitation in a static magnetic field

Manabu Watanabe, Yuki Takahashi, Sayaka Imaizumi, Yufan Zhao, Masayoshi Adachi, Makoto Ohtsuka, Akihiko Chiba, Yuichiro Koizumi, Hiroyuki Fukuyama

Thermochimica Acta　Vol. 708　2022/02/01　Research paper (scientific journal)

Melting and Solidification Behavior of 316L Steel Induced by Electron-Beam Irradiation for Additive Manufacturing

奥川将行, 宮田雄一朗, WANG Lei, 能勢和史, 小泉雄一郎, 中野貴由

スマートプロセス学会誌　Vol. 10　No. 4　2021/12/31　Research paper (scientific journal)

Comprehensive phase-field study on directionally-solidified MoSi<inf>2</inf>/Mo<inf>5</inf>Si<inf>3</inf> eutectic alloy

Chuanqi Zhu, Jimpei Yamamoto, Yuichiro Koizumi, Koretaka Yuge, Kyosuke Kishida, Haruyuki Inui

Materials Science Forum　Vol. 1016 MSF　p. 749-754　2021/12/31　Research paper (international conference proceedings)

Modified cellular automaton simulation of metal additive manufacturing

Jun Kubo, Yuichiro Koizumi, Takuya Ishimoto, Takayoshi Nakano

Materials Transactions　Vol. 62　No. 6　p. 864-870　2021/12/31　Research paper (scientific journal)

Control of crystallographic texture and mechanical properties of hastelloy-X via laser powder bed fusion

Shinya Hibino, Tsubasa Todo, Takuya Ishimoto, Ozkan Gokcekaya, Yuichiro Koizumi, Kenichiroh Igashira, Takayoshi Nakano

Crystals　Vol. 11　No. 9　2021/09/01　Research paper (scientific journal)

Inverse columnar-equiaxed transition (CET) in 304 and 316l stainless steels melt by electron beam for additive manufacturing (AM)

Yuichiro Miyata, Masayuki Okugawa, Yuichiro Koizumi, Takayoshi Nakano

Crystals　Vol. 11　No. 8　2021/08/01　Research paper (scientific journal)

Prediction of Solute Element Segregation in Additive Manufactured Ni-based Superalloy using Multi-phase Field Simulation

Masayuki OKUGAWA, Kenji SAITO, Makoto WAKABAYASHI, Yuichiro KOIZUMI

Journal of Smart Processing　Vol. 10　No. 4　p. 214-219　2021/07/01　Research paper (scientific journal)

Modified Cellular Automaton Simulation of Metal Additive Manufacturing

Jun Kubo, Yuichiro Koizumi, Takuya Ishimoto, Takayoshi Nakano

Journal of the Japan Institute of Metals and Materials　Vol. 85　No. 3　p. 103-109　2021/03/01　Research paper (scientific journal)

Thermal properties of powder beds in energy absorption and heat transfer during additive manufacturing with electron beam

Yufan Zhao, Yuichiro Koizumi, Kenta Aoyagi, Kenta Yamanaka, Akihiko Chiba

Powder Technology　Vol. 381　p. 44-54　2021/03/01　Research paper (scientific journal)

Effect of niobium addition on tensile properties and oxidation resistance of a titanium-based alloy

Yujie Cui, Kenta Aoyagi, Yuichiro Koizumi, Cheng Yang, Huakang Bian, Yuichiro Hayasaka, Tadashi Fujieda, Akihiko Chiba

Corrosion Science　Vol. 180　2021/03/01　Research paper (scientific journal)

Spinodal Decomposition in Plastically Deformed Fe-Cr-Co Magnet Alloy

Hitomi Iwaizako, Masayuki Okugawa, Kenji Saito, Yuichiro Koizumi, Akihiko Chiba, Yuichi Tachiya, Manabu Ohnuma, Kingo Kuritani

Tetsu-to-Hagane　Vol. 107　No. 2　p. 146-153　2021/01/01　Research paper (scientific journal)

Quantitative relationship between microstructural factors and fatigue life of Ti-5Al-2Sn-2Zr-4Cr-4 Mo (Ti-17) fabricated using a 1500-ton forging simulator

M. Niinomi, T. Akahori, M. Nakai, Y. Koizumi, A. Chiba, T. Nakano, T. Kakeshita, Y. Yamabe-Mitarai, S. Kuroda, N. Motohashi, Y. Itsumi, T. Choda

MATEC Web of Conferences　Vol. 321　p. 11015-11015　2020/12/31　Research paper (scientific journal)

Control of crystallographic orientation by metal additive manufacturing process of β-type Ti alloys based on the bone tissue anisotropy

Takayoshi Nakano, Takuya Ishimoto, Aira Matsugaki, Koji Hagihara, Yuichiro Koizumi, Ryosuke Ozasa

MATEC Web of Conferences　Vol. 321　p. 05002-05002　2020/12/31　Research paper (scientific journal)

Manufacturing of a nanosized TiB strengthened Ti-based alloy via electron beam powder bed fusion

Yujie Cui, Kenta Aoyagi, Yufan Zhao, Kenta Yamanaka, Yuichiro Hayasaka, Yuichiro Koizumi, Tadashi Fujieda, Akihiko Chiba

Additive Manufacturing　Vol. 36　2020/12/01　Research paper (scientific journal)

Development of Shape Memory and Shock Absorbing Metamaterials Using 3D Printing

Sosuke KANEGAE, Masayuki OKUGAWA, Yuichiro KOIZUMI

The Journal of 4D and Functional Fabrication　Vol. 1　No. 1　p. 1-8　2020/09/01　Research paper (scientific journal)

Isothermal γ → ε phase transformation behavior in a Co-Cr-Mo alloy depending on thermal history during electron beam powder-bed additive manufacturing

Yufan Zhao, Yuichiro Koizumi, Kenta Aoyagi, Kenta Yamanaka, Akihiko Chiba

Journal of Materials Science and Technology　Vol. 50　p. 162-170　2020/08/01　Research paper (scientific journal)

Influence of CaO/SiO₂ on the Reduction Behavior of Sintered Fe₂O₃–CaO–SiO₂–Al₂O₃ Tablets at the Softening and Melting Temperatures

Kengo Kato, Hirokazu Konishi, Hideki Ono, Shinji Fujimoto, Yuichiro Koizumi

ISIJ International　Vol. 60　No. 7　p. 1479-1486　2020/07/15　Research paper (scientific journal)

Enhanced oxidation resistance of a titanium–based alloy by the addition of boron and the application of electron beam melting

Yujie Cui, Kenta Aoyagi, Yuichiro Koizumi, Tadashi Fujieda, Akihiko Chiba

Additive Manufacturing　Vol. 31　No. 100971　2020/01/01　Research paper (scientific journal)

Precipitation during γ-ε phase transformation in biomedical co-cr-mo alloys fabricated by electron beam melting

Kosuke Ueki, Motoka Kasamatsu, Kyosuke Ueda, Yuichiro Koizumi, Daixiu Wei, Akihiko Chiba, Takayuki Narushima

Metals　Vol. 10　No. 1　p. 1-13　2020/01/01　Research paper (scientific journal)

Pattern formation mechanism of directionally-solidified MoSi<inf>2</inf>/Mo<inf>5</inf>Si<inf>3</inf> eutectic by phase-field simulation

Chuanqi Zhu, Yuichiro Koizumi, Akihiko Chiba, Koretaka Yuge, Kyosuke Kishida, Haruyuki Inui

Intermetallics　Vol. 116　2020/01/01

Reduction Behavior of Iron Oxide and Influence of Basicity in Initial Melt Formation Zone

Hirokazu Konishi, Kengo Kato, Hideki Ono, Hirotoshi Kawabata, Yuichiro Koizumi

Tetsu-to-Hagane　Vol. 105　No. 12　p. 1099-1107　2019/12/31　Research paper (scientific journal)

Quantitative and qualitative relationship between microstructural factors and fatigue lives under load- And strain-controlled conditions of Ti5Al2Sn2Zr4Cr4Mo (Ti-17) fabricated using a 1500-ton forging simulator

M. Niinomi, T. Akahori, M. Nakai, Y. Koizumi, A. Chiba, T. Nakano, T. Kakeshita, Y. Yamabe-Mitarai, S. Kuroda, N. Motohashi, Y. Itsumi, T. Choda

Materials Transactions　Vol. 60　No. 9　p. 1740-1748　2019/12/31　Research paper (scientific journal)

Low Springback and Low Young's Modulus in Ti-29Nb-13Ta-4.6Zr Alloy Modified by Mo Addition

Qiang Li, Qiang Qi, Junjie Li, Masaaki Nakai, Mitsuo Niinomi, Yuichiro Koizumi, Daixiu Wei, Kenta Yamanaka, Takayoshi Nakano, Akihiko Chiba, Xuyan Liu, Deng Pan

MATERIALS TRANSACTIONS　Vol. 60　No. 9　p. 1755-1762　2019/12/31　Research paper (scientific journal)

Low springback and low Young’s modulus in Ti29Nb13Ta4.6Zr alloy modified by Mo addition

Qiang Li, Qiang Qi, Junjie Li, Masaaki Nakai, Mitsuo Niinomi, Yuichiro Koizumi, Daixiu Wei, Kenta Yamanaka, Takayoshi Nakano, Akihiko Chiba, Xuyan Liu, Deng Pan

Materials Transactions　Vol. 60　No. 9　p. 1755-1762　2019/12/31　Research paper (scientific journal)

Development of low-Young’s modulus Ti–Nb-based alloys with Cr addition

Qiang Li, Guanghao Ma, Junjie Li, Mitsuo Niinomi, Masaaki Nakai, Yuichro Koizumi, Dai-Xiu Wei, Tomoyuki Kakeshita, Takayoshi Nakano, Akihiko Chiba, Xuyan Liu, Kai Zhou, Deng Pan

Journal of Materials Science　Vol. 54　No. 11　p. 8675-8683　2019/12/31　Research paper (scientific journal)

Development of advanced control technology of plasma-MIG processand application to dissimilar joining

Seong Min HONG, Shinichi TASHIRO, Mamat Bin SARIZAM, Manabu TANAKA, Yuichiro KOIZUMI

ICMaSS 2019　2019/11/01　Research paper (international conference proceedings)

Manipulating local heat accumulation towards controlled quality and microstructure of a Co-Cr-Mo alloy in powder bed fusion with electron beam

Y. Zhao, Yuichiro Koizumi, K. Aoyagi, K. Yamanaka, Akihiko Chiba

Materials Letters　Vol. 254　p. 269-272　2019/11/01　Research paper (scientific journal)

Introducing dislocations locally in Al-supersaturated α<inf>2</inf>-Ti<inf>3</inf>Al single crystal via nanoscale wedge indentation

Daixiu Wei, Yuichiro Koizumi, Makoto Nagasako, Yusuke Kubota, Tomoyuki Aoyagi, Yuki Nakagawa, Masahiko Yoshino, Akihiko Chiba, Hidemi Kato

Intermetallics　Vol. 113　2019/10/01　Research paper (scientific journal)

Microstructural control of alloy 718 fabricated by electron beam melting with expanded processing window by adaptive offset method

Xiao Ding, Yuichiro Koizumi, K. Aoyagi, Tadashi Kii, Nobuyuki Sasaki, Yuichiro Hayasaka, K. Yamanaka, Akihiko Chiba

Materials Science and Engineering A　Vol. 764　2019/09/09　Research paper (scientific journal)

On microstructural homogenization and mechanical properties optimization of biomedical Co-Cr-Mo alloy additively manufactured by using electron beam melting

Daixiu Wei, Ainiwaer Anniyaer, Yuichiro Koizumi, Kenta Aoyagi, Makoto Nagasako, Hidemi Kato, Akihiko Chiba

Additive Manufacturing　Vol. 28　p. 215-227　2019/08/01　Research paper (scientific journal)

Development of low-Young’s modulus Ti–Nb-based alloys with Cr addition

Qiang Li, Guanghao Ma, Junjie Li, Mitsuo Niinomi, Masaaki Nakai, Yuichro Koizumi, Dai Xiu Wei, Tomoyuki Kakeshita, Takayoshi Nakano, Akihiko Chiba, Xuyan Liu, Kai Zhou, Deng Pan

Journal of Materials Science　Vol. 54　No. 11　p. 8675-8683　2019/06/15　Research paper (scientific journal)

Comprehensive study on mechanisms for grain morphology evolution and texture development in powder bed fusion with electron beam of Co–Cr–Mo alloy

Yufan Zhao, Yuichiro Koizumi, Kenta Aoyagi, Daixiu Wei, Kenta Yamanaka, Akihiko Chiba

Materialia　Vol. 6　2019/06/01　Research paper (scientific journal)

Novel Co-rich high performance twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) high-entropy alloys

Daixiu Wei, Xiaoqing Li, Jing Jiang, Weicheng Heng, Yuichiro Koizumi, Won Mi Choi, Byeong Joo Lee, Hyoung Seop Kim, Hidemi Kato, Akihiko Chiba

Scripta Materialia　Vol. 165　p. 39-43　2019/05/01　Research paper (scientific journal)

Molten pool behavior and effect of fluid flow on solidification conditions in selective electron beam melting (SEBM) of a biomedical Co-Cr-Mo alloy

Yufan Zhao, Yuichiro Koizumi, Kenta Aoyagi, Daixiu Wei, Kenta Yamanaka, Akihiko Chiba

Additive Manufacturing　Vol. 26　p. 202-214　2019/03/01　Research paper (scientific journal)

Numerical study on the effective stiffness of topology-optimized lattice structures made of orthotropic crystal grains with optimal orientation

Akihiro Takezawa, Xiaopeng Zhang, Yuichiro Koizumi

Computational Materials Science　Vol. 159　p. 202-209　2019/03/01　Research paper (scientific journal)

Effect of process parameters on melt pool geometry and microstructure development for electron beam melting of IN718: A systematic single bead analysis study

Xiao Ding, Yuichiro Koizumi, Daixiu Wei, Akihiko Chiba

Additive Manufacturing　Vol. 26　p. 215-226　2019/03/01　Research paper (scientific journal)

Novel Co-rich high entropy alloys with superior tensile properties

Daixiu Wei, Xiaoqing Li, Weicheng Heng, Yuichiro Koizumi, Feng He, Won Mi Choi, Byeong Joo Lee, Hyoung Seop Kim, Hidemi Kato, Akihiko Chiba

Materials Research Letters　Vol. 7　No. 2　p. 82-88　2019/02/01　Research paper (scientific journal)

Development of low-Young's modulus Ti-Nb-based alloys with Cr addition

Qiang Li, Guanghao Ma, Junjie Li, Mitsuo Niinomi, Masaaki Nakai, Yuichro Koizumi, Dai-Xiu Wei, Tomoyuki Kakeshita, Takayoshi Nakano, Akihiko Chiba, Xuyan Liu, Kai Zhou, Deng Pan

Additive Manufacturing　Vol. 54　p. 8675-8683　2019/01/01　Research paper (scientific journal)

Comprehensive study on mechanisms for grain morphology evolution and texture development in powder bed fusion with electron beam of Co-Cr-Mo alloy

Yufan Zhao, Yuichiro Koizumi, Kenta Aoyagi, Daixiu Wei, Kenta Yamanaka, Akihiko Chiba

Materialia　2019/01/01　Research paper (scientific journal)

Microstructural control of alloy 718 fabricated by electron beam melting with expanded processing window by adaptive offset method

Xiao Ding, Yuichiro Koizumi, Kenta Aoyagi, Tadashi Kii, Nobuyuki Sasaki, Yuichiro Hayasaka, Kenta Yamanaka, Akihiko Chiba

2019/01/01　Research paper (scientific journal)

Novel Co-rich high-performance twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) high-entropy alloys

Daixiu Wei, Xiaoqing Li, Jing Jiang, Weicheng Heng, Yuichiro Koizumi, Won-Mi Choi, Byeong-Joo Lee, Hyoung Seop Kim, Hidemi Kato, Akihiko Chiba

Vol. 165　p. 39-43　2019/01/01　Research paper (scientific journal)

Effect of process parameters on melt pool geometry and microstructure development for electron beam melting of IN718: A systematic single bead analysis study

XiaoDing, Yuichiro Koizumi, Daixiu Wei, Akihiko Chiba

Additive Manufacturing　Vol. 26　p. 215-226　2019/01/01　Research paper (scientific journal)

Electron beam melting of boron-modified Ti-2Al-2Sn-4Zr-2Mo-0.1Si alloy with superior tensile strength and oxidation resistance at elevated temperatures.

Tadashi Fujieda, Y. Cui, Kenta Aoyagi, Yuichiro Koizumi, Akihiko Chiba

Materialia　2019/01/01　Research paper (scientific journal)

On microstructural homogenization and mechanical properties optimization of biomedical Co-Cr-Mo alloy additively manufactured by using electron beam melting.

D. Wei, A. Anniyaer, Y. Koizumi, K. Aoyagi, M. Nagasako, H. Kato, A. Chiba

Additive Manufacturing　Vol. 28　p. 215-227　2019/01/01　Research paper (scientific journal)

Quantitative and Qualitative Relationship between Microstructural Factors and Fatigue Lives under Load- and Strain-Controlled Conditions of Ti-5Al-2Sn-2Zr-4Cr-4Mo (Ti-17) Fabricated Using a 1500-ton Forging Simulator

Mitsuo Niinomi, Toshikazu Akahori, Masaaki Nakai, Yuichiro Koizumi, Akihiko Chiba, Takayoshi Nakano, Tomoyuki Kakeshita, Yoko Yamabe-Mitarai, Shuji Kuroda, Norie Motohashi, Yoshio Itsumi, Takashi Choda

Materials Transactions　2019/01/01　Research paper (scientific journal)

Molten Pool Behavior and Effect of Fluid Flow on Solidification Conditions in Selective Electron Beam Melting (SEBM) of a Biomedical Co-Cr-Mo Alloy

Yufan Zhao, Yuichiro Koizumi, Kenta Aoyagi, Daixiu Wei, Kenta Yamanaka, Akihiko Chiba

Additive Manufacturing　Vol. 26　p. 202-214　2019/01/01　Research paper (scientific journal)

Pattern formation mechanism of directionally-solidified MoSi_{2}/ Mo_{5}_Si_{3} eutectic by phase-field simulation

Chuanqi Zhu, Yuichiro Koizumi, Akihiko Chiba, Koretaka Yuge, Kyosuke Kishida, Haruyuki Inui

2019/01/01　Research paper (scientific journal)

初期融液生成領域における酸化鉄の還元挙動と塩基度の影響

小西宏和, 加藤謙吾, 小野英樹, 川端弘俊, 小泉 雄一郎

鉄と鋼　Vol. 105　No. 12　p. 1099-1107　2019/01/01　Research paper (scientific journal)

Numerical study on the effective stiffness of topology-optimized lattice structures made of orthotropic crystal grains with optimal orientation

A. Takezawa, X. Zhang, Y. Koizumi

Computational Materials Science　2019/01/01　Research paper (scientific journal)

Novel Co-rich high entropy alloys with superior tensile properties.

Daixiu Wei, Xiaoqing Li, Weicheng Heng, Yuichiro Koizumi, Feng He, Won-Mi Choi, Byeong-Joo Lee, Hyoung Seop Kim, Hidemi Kato, Akihiko Chiba

Materials Research Letters　Vol. 7　No. 2　p. 82-88　2019/01/01　Research paper (scientific journal)

Mechanical and corrosion properties of CoCrFeNiTi-based high-entropy alloy additive manufactured using selective laser melting

Tadashi Fujieda, Meichuan Chen, Hiroshi Shiratori, Kosuke Kuwabara, Kenta Yamanaka, Yuichiro Koizumi, Akihiko Chiba, Seiichi Watanabe

Additive Manufacturing　Vol. 25　p. 412-420　2019/01/01　Research paper (scientific journal)

Precipitation during γ-ε Phase Transformation in Biomedical Co-Cr-Mo Alloys Fabricated by Electron Beam Melting

Kosuke Ueki, Motoka Kasamatsu, Kyosuke Ueda, Yuichiro Koizumi, Daixiu Wei, Akihiko Chiba, Takayuki Narushima

Metals　Vol. 10　No. 71　p. 1-13　2019/01/01　Research paper (scientific journal)

溶融塩化物中における希土類イオンの電気化学的還元

小西宏和, 小泉 雄一郎

溶融塩および高温科学　Vol. 62　No. 1　p. 25-33　2019/01/01　Research paper (scientific journal)

Introducing dislocations locally in Al-supersaturated α2-Ti3Al single crystal via nanoscale wedge indentation.

Daixiu Wei, Yuichiro Koizumi, M. Nagasako, Y. Kubota, T. Aoyagi, Y. Nakagawa, Hidemi Kato

Intermetallics　2019/01/01　Research paper (scientific journal)

Manipulating local heat accumulation towards controlled quality and microstructure of a Co-Cr-Mo alloy in powder bed fusion with electron beam

Yufan Zhao, Yuichiro Koizumi, Kenta Aoyagi, Kenta Yamanaka, Akihiko Chiba

Materials Letters　2019/01/01　Research paper (scientific journal)

Mechanical and corrosion properties of CoCrFeNiTi-based high-entropy alloy additive manufactured using selective laser melting

Tadashi Fujieda, Meichuan Chen, Hiroshi Shiratori, Kosuke Kuwabara, Kenta Yamanaka, Yuichiro Koizumi, Akihiko Chiba, Seiichi Watanabe

Additive Manufacturing　Vol. 25　p. 412-420　2019/01/01　Research paper (scientific journal)

Low young's modulus TiNbO with high strength and good plasticity

Qiang Li, Dong Ma, Junjie Li, Mitsuo Niinomi, Masaaki Nakai, Yuichiro Koizumi, Daixiu Wei, Tomoyuki Kakeshita, Takayoshi Nakano, Akihiko Chiba, Kai Zhou, Deng Pan

Materials Transactions　Vol. 59　No. 5　p. 858-860　2018/12/31　Research paper (scientific journal)

Electrochemical formation of Dy-Fe and Nd-fe alloys in molten CaCl <inf>2</inf> -LiCl systems

H. Konishi, H. Hua, H. Ono, Y. Koizumi, T. Oishi, T. Nohira

ECS Transactions　Vol. 86　No. 14　p. 321-328　2018/12/31　Research paper (international conference proceedings)

Electrochemical separation of rare earth from ND magnet scraps

Hirokazu Konishi, Hideki Ono, Yuichiro Koizumi, Tetsuo Oishi, Toshiyuki Nohira

ICS 2018 - 7th International Congress on Science and Technology of Steelmaking: The Challenge of Industry 4.0　2018/12/31　Research paper (international conference proceedings)

Electron beam melting of boron-modified Ti–2Al–2Sn–4Zr–2Mo–0.1Si alloy with superior tensile strength and oxidation resistance at elevated temperatures

Tadashi Fujieda, Yujie Cui, Kenta Aoyagi, Yuichiro Koizumi, Akihiko Chiba

Materialia　Vol. 4　p. 367-372　2018/12/01　Research paper (scientific journal)

Heterogeneous microstructures and corrosion resistance of biomedical Co-Cr-Mo alloy fabricated by electron beam melting (EBM)

Daixiu Wei, Yuichiro Koizumi, Akihiko Chiba, Kosuke Ueki, Kyosuke Ueda, Takayuki Narushima, Yusuke Tsutsumi, Takao Hanawa

Additive Manufacturing　Vol. 24　p. 103-114　2018/12/01　Research paper (scientific journal)

金属付加製造の現場と粉末床溶融結合における組織制御

小泉 雄一郎, 山中 謙太, 青柳 健大, 千葉 晶彦

スマートプロセス学会誌　Vol. 7　No. 6　p. 216-222　2018/11/01

Electron beam additive manufacturing of Inconel 718 alloy rods: Impact of build direction on microstructure and high-temperature tensile properties

Shi Hai Sun, Yuichiro Koizumi, Tsuyoshi Saito, Kenta Yamanaka, Yun Ping Li, Yujie Cui, Akihiko Chiba

Additive Manufacturing　Vol. 23　p. 457-470　2018/10/01　Research paper (scientific journal)

Mechanical and corrosion properties of AlCoCrFeNi high-entropy alloy fabricated with selective electron beam melting

Kosuke Kuwabara, Hiroshi Shiratori, Tadashi Fujieda, Kenta Yamanaka, Yuichiro Koizumi, Akihiko Chiba

Additive Manufacturing　Vol. 23　p. 264-271　2018/10/01　Research paper (scientific journal)

Significant impact of yttrium microaddition on high temperature tensile properties of Inconel 713C superalloy

Dong Soo Kang, Yuichiro Koizumi, Kenta Yamanaka, Kenta Aoyagi, Huakang Bian, Akihiko Chiba

Materials Letters　Vol. 227　p. 40-43　2018/09/15　Research paper (scientific journal)

Isotropic Ti–6Al–4V lattice via topology optimization and electron-beam melting

Akihiro Takezawa, Kazuo Yonekura, Yuichiro Koizumi, Xiaopeng Zhang, Mitsuru Kitamura

Additive Manufacturing　Vol. 22　p. 634-642　2018/08/01　Research paper (scientific journal)

Porous surface structures in biomedical Co-Cr-Mo alloy prepared by local dealloying in a metallic melt

Daixiu Wei, Yuichiro Koizumi, Akihiko Chiba

Materials Letters　Vol. 219　p. 256-259　2018/05/15　Research paper (scientific journal)

Fatigue improvement of electron beam melting-fabricated biomedical Co–Cr–Mo alloy by accessible heat treatment

Daixiu Wei, Yuichiro Koizumi, Taiyo Takashima, Makoto Nagasako, Akihiko Chiba

Materials Research Letters　Vol. 6　No. 1　p. 93-99　2018/01/02　Research paper (scientific journal)

Mechanical and corrosion properties of AlCoCrFeNi high-entropy alloy fabricated with selective electron beam melting

Yufan Zhao, Yuichiro Koizumi, Kenta Aoyagi, Daixiu Wei, Kenta Yamanaka, Akihiko Chiba

Additive Manufacturing　Vol. 23　p. 264-271　2018/01/01　Research paper (scientific journal)

Isotropic Ti-6Al-4V lattice via topology optimization and electron-beam melting

A. Takezawa, K. Yonekura, Y. Koizumi, X. Zhang, M. Kitamura

Additive Manufacturing　Vol. 22　p. 634-642　2018/01/01　Research paper (scientific journal)

Electron beam beam melting of boron-modified Ti-2Al-2Sn-4Zr-2Mo-0.1Si alloy with superior tensile strength and oxidation resistance at elevated temperatures

Tadashi Fujieda, Yujie Cui, Yuichiro Koizumi, Akihiko Chiba

Materialia　2018/01/01　Research paper (scientific journal)

Heterogeneous microstructures and corrosion resistance of biomedical Co-Cr-Mo alloy fabricated by electron beam melting (EBM)

Daixiu Wei, Yuichiro Koizumi, Akihiko Chiba, Kosuke Ueki, Kyosuke Ueda, Takayuki Narushima, Yusuke Tsutsumi, Takao Hanawa

Additive Manufacturing　2018/01/01　Research paper (scientific journal)

Porous surface structures in biomedical Co-Cr-Mo alloy prepared by local dealloying in a metallic melt

Dai-Xiu Wei, Yuichiro Koizumi, Akihiko Chiba

Materials Letters　Vol. 219　p. 256-259　2018/01/01　Research paper (scientific journal)

Fatigue improvement of electron beam melting-fabricated biomedical Co-Cr-Mo alloy by accessible heat treatment

Dai-Xiu Wei, Yuichiro Koizumi, Taiyo Takashima, Makoto Nagasako, Akihiko Chiba

Materials Research Letters　Vol. 18　p. 194-202　2018/01/01　Research paper (scientific journal)

Guide to development of innovative joining technology - Electron beam melting

Yuichiro Koizumi, Kenta Aoyagi, Kenta Yamanaka, Akihiko Chiba

Yosetsu Gakkai Shi/Journal of the Japan Welding Society　Vol. 86　No. 8　p. 570-578　2017/12/31　Research paper (scientific journal)

Characterization of powder bed generation in electron beam additive manufacturing by discrete element method (DEM)

Yufan Zhao, Yuichiro Koizumi, Kenta Aoyagi, Kenta Yamanaka, Akihiko Chiba

MATERIALS TODAY-PROCEEDINGS　Vol. 4　No. 11　p. 11437-11440　2017/12/31　Research paper (international conference proceedings)

Characterization of powder bed generation in electron beam additive manufacturing by discrete element method (DEM)

Yufan Zhao, Yuichiro Koizumi, Kenta Aoyagi, Kenta Yamanaka, Akihiko Chiba

Materials Today: Proceedings　Vol. 4　No. 11　p. 11437-11440　2017/12/31　Research paper (international conference proceedings)

Damping capacity of pre-compressed magnesium alloys after annealing

Yujie Cui, Jiaxiang Li, Yunping Li, Yuichiro Koizumi, Akihiko Chiba

Materials Science and Engineering A　Vol. 708　p. 104-109　2017/12/21　Research paper (scientific journal)

金属系材料の3次元積層造形技術の基礎

小泉雄一郎, 千葉晶彦, 野村直之, 中野貴由

まてりあ　2017/12/01

革新接合技術開発への道しるべ－電子ビーム積層造形－

小泉 雄一郎, 青柳 健大, 山中 謙太, 千葉 晶彦

溶接学会誌　Vol. 86　No. 8　p. 570-578　2017/12/01

Regulating twin boundary mobility by annealing in magnesium and its alloys

Yujie Cui, Yunping Li, Zhongchang Wang, Qian Lei, Yuichiro Koizumi, Akihiko Chiba

International Journal of Plasticity　Vol. 99　p. 1-18　2017/12/01　Research paper (scientific journal)

High-stiffness and strength porous maraging steel via topology optimization and selective laser melting

Akihiro Takezawa, Yuichiro Koizumi, Makoto Kobashi

Additive Manufacturing　Vol. 18　p. 194-202　2017/12/01　Research paper (scientific journal)

How to Control Mechanical Properties of Metals (Biomedical Co-Cr-Mo alloy) 3D-Printed by Electron Beam Melting (EBM)

Y. Koizumi, S.-H. Sun, X Ding, T. Takashima, S. Kurosu, Yufan Zao, Daixiu Wei, Hao Wang, K. Aoyagi, K. Yamanaka, A. Chiba

Proceeding of Int. Conf. on Materials and Systems for Sustainability (ICMaSS) 2017, 2nd International Symposium on Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development (iLIM-2)　2017/09/01　Research paper (international conference proceedings)

Strain-controlled iso-thermal fatigue behavior of Co–29Cr–6Mo used for tooling materials in Al die casting

Phacharaphon Tunthawiroon, Yunping Li, Yuichiro Koizumi, Akihiko Chiba

Materials Science and Engineering A　Vol. 703　p. 27-36　2017/08/04　Research paper (scientific journal)

Numerical Simulation of Solidification in Additive Manufacturing of Ti-Alloy by Multi-Phase-Field Method

Yusuke Shimono, Mototeru Oba, Sukeharu Nomoto, Yuichiro Koizumi, Akihiko Chiba

Proceedings of Solid Freeform Fabrication Symposium (2017)　p. 1048-1057　2017/08/01　Research paper (international conference proceedings)

Study of microstructure evolution and properties of Cu-Fe microcomposites produced by a pre-alloyed powder method

Fenglin Wang, Kimio Wakoh, Yunping Li, Shun Ito, Kenta Yamanaka, Yuichiro Koizumi, Akihiko Chiba

Materials and Design　Vol. 126　p. 64-72　2017/07/15　Research paper (scientific journal)

Effects of carbon addition on wear mechanisms of CoCrMo metal-on-metal hip joint bearings

Yan Chen, Yunping Li, Yuichiro Koizumi, Hani Haider, Akihiko Chiba

Materials Science and Engineering C　Vol. 76　p. 997-1004　2017/07/01　Research paper (scientific journal)

Influence of cobalt addition on microstructure and hot workability of IN713C superalloy

Yunping Li, Xianjuan Ye, Jiaxiang Li, Yi Zhang, Yuichiro Koizumi, Akihiko Chiba

Materials and Design　Vol. 122　p. 340-346　2017/05/15　Research paper (scientific journal)

Impact of solute elements on detwinning in magnesium and its alloys

Yujie Cui, Yunping Li, Zhongchang Wang, Xiao Ding, Yuichiro Koizumi, Huakang Bian, Liyang Lin, Akihiko Chiba

International Journal of Plasticity　Vol. 91　p. 134-159　2017/04/01　Research paper (scientific journal)

CoCrFeNiTi-based high-entropy alloy with superior tensile strength and corrosion resistance achieved by a combination of additive manufacturing using selective electron beam melting and solution treatment

Tadashi Fujieda, Hiroshi Shiratori, Kosuke Kuwabara, Mamoru Hirota, Takahiko Kato, Kenta Yamanaka, Yuichiro Koizumi, Akihiko Chiba, Seiichi Watanabe

Materials Letters　Vol. 189　p. 148-151　2017/02/15　Research paper (scientific journal)

Refinement of lamellar structures in Ti-Al alloy

Dai Xiu Wei, Yuichiro Koizumi, Makoto Nagasako, Akihiko Chiba

Acta Materialia　Vol. 125　p. 81-97　2017/02/15　Research paper (scientific journal)

Discontinuous yielding and microstructural evolution of Ti-40 at.% Al alloy compressed in single α-hcp phase region

Dai Xiu Wei, Yuichiro Koizumi, Akihiko Chiba

Journal of Alloys and Compounds　Vol. 693　p. 1261-1276　2017/02/05　Research paper (scientific journal)

Porous metal produced by selective laser melting with effective isotropic thermal conductivity close to the Hashin–Shtrikman bound

Akihiro Takezawa, Makoto Kobashi, Yuichiro Koizumi, Mitsuru Kitamura

International Journal of Heat and Mass Transfer　Vol. 105　p. 564-572　2017/02/01　Research paper (scientific journal)

Preface to Special Issue on Current Issues and Future Perspectives of Design and Manufacturing Process of Biomedical Metallic Devices

Koizumi Yuichiro, Ueda Kyosuke, Tsutsumi Yusuke, Ishimoto Takuya, Ohtsu Naofumi, Tanaka Yasuhiro

Materia Japan　Vol. 55　No. 4　p. 131-132　2016/12/31

Microstructure and Mechanical Properties of Co-Cr-based and Ni-based Alloys Additively Manufactured by Electro Beam Melting (EBM)

Koizumi Yuichiro, Sun Shi-Hai, Ding Xiao, Saito Tsuyoshi, Yamanaka Kenta, Chiba Akihiko

Preprints of the National Meeting of JWS　Vol. 2016　p. 16-17　2016/12/31

Effect of building position on phase distribution in Co-Cr-Mo alloy additive manufactured by electron-beam melting

Taiyo Takashima, Yuichiro Koizumi, Yunping Li, Kenta Yamanaka, Tsuyoshi Saito, Akihiko Chiba

Materials Transactions　Vol. 57　No. 12　p. 2041-2047　2016/12/31　Research paper (international conference proceedings)

Parameter optimization for electron beam melting of IN718 based on melt pool characterization

Xiao Ding, Yuichiro Koizumi, Akihiko Chiba

Proceedings of the International Symposium on Superalloys　Vol. 2016-January　p. 367-373　2016/12/31　Research paper (international conference proceedings)

Design of next generation Ni-base single crystal superalloys containing Ir: Towards 1150 °c temperature capability

Yokokawa, T, Harada, H, Mori, Y, Kawagishi, K, Koizumi, Y, Kobayashi, T, Yuyama, M, Suzuki, S

Proc Int Symp Superalloys　Vol. 2016-January　p. 123-130　2016/12/31　Research paper (scientific journal)

Precipitation behavior of a novel cobalt-based superalloy subjected to prior plastic deformations

Huakang Bian, Yunping Li, Daixiu Wei, Yujie Cui, Fenglin Wang, Shihai Sun, Kenta Yamanaka, Yuichiro Koizumi, Akihiko Chiba

Materials and Design　Vol. 112　p. 1-10　2016/12/15　Research paper (scientific journal)

Cellular lattices of biomedical Co-Cr-Mo-alloy fabricated by electron beam melting with the aid of shape optimization

Yuichiro Koizumi, Arata Okazaki, Akihiko Chiba, Takahiko Kato, Akihiro Takezawa

Additive Manufacturing　Vol. 12　p. 305-313　2016/10/01　Research paper (scientific journal)

Quantitative in vivo biocompatibility of new ultralow-nickel cobalt–chromium–molybdenum alloys

Kazuaki Sonofuchi, Yoshihiro Hagiwara, Yuichiro Koizumi, Akihiko Chiba, Mitsuko Kawano, Masafumi Nakayama, Kouetsu Ogasawara, Yutaka Yabe, Eiji Itoi

Journal of Orthopaedic Research　Vol. 34　No. 9　p. 1505-1513　2016/09/01　Research paper (scientific journal)

Microstructure and Creep Behavior of Alloy 718 fabricated by Electron-Beam Melting

Yuichiro Koizumi, Shihai Sun, Xiao Ding, Akihiko Chiba

Proceedings of the Visual-JW2016　Vol. 1　p. 13-14　2016/08/01　Research paper (international conference proceedings)

Modeling and Simulation of Electron Beam Additive Manufacturing for Biomedical Co-Cr-Mo Alloy

Yufan Zhao, Yuichiro Koizumi, Kenta Aoyagi, Kenta Yamanaka, Akihiko Chiba

Proceedings of the Visual-JW2016　Vol. 3　p. 48-49　2016/08/01　Research paper (international conference proceedings)

Alloy 718 Rods Additively Manufactured By Electron-Beam Melting (EBM)

Yuichiro Koizumi, Shi-Hai Sun, Tsuyoshi Saito, Kenta Yamanaka, Yun-Ping Li, Yujie Cui, Ding Xiao, Akihiko Chiba

Proceedings of the Ninth Pacific Rim International Conferenceon Advanced Materials and Processing (PRICM9)　p. 288-290　2016/08/01　Research paper (international conference proceedings)

Cellular lattice of biomedical Co-Cr-Mo alloy fabricated by electron beam melting

Yuichiro Koizumi, Arata Okazaki, Akihiko Chiba, Takahiko Kato, Akihiro Takezawa

Proceedings of the Visual-JW2016　Vol. 3　p. 50-51　2016/08/01　Research paper (international conference proceedings)

Dynamic recrystallization behavior of biomedical Co-29Cr-6Mo-0.16N alloy

Yunping Li, Jiaxiang Li, Yuichiro Koizumi, Akihiko Chiba

Materials Characterization　Vol. 118　p. 50-56　2016/08/01　Research paper (scientific journal)

Effect of Process Parameters on Melt Pool Shape and Microstructure for Electron Beam Melting of IN718

Xiao Ding, Yuichiro Koizumi, Akihiko Chiba

Proceedings of the 13th International Symposium on Superalloys (SUPERALLOYS 2016)　p. 367-373　2016/07/01　Research paper (international conference proceedings)

Effects of surface friction treatment on the in vitro release of constituent metals from the biomedical Co-29Cr-6Mo-0.16N alloy

Xiaoyu Wang, Yunping Li, Yuhang Hou, Huakang Bian, Yuichiro Koizumi, Akihiko Chiba

Materials Science and Engineering C　Vol. 64　p. 260-268　2016/07/01　Research paper (scientific journal)

Dynamic recrystallization in biomedical Co-29Cr-6Mo-0.16N alloy with low stacking fault energy

Yunping Li, Yuichiro Koizumi, Akihiko Chiba

Materials Science and Engineering A　Vol. 668　p. 86-96　2016/06/21　Research paper (scientific journal)

Investigation on hot deformation behavior of nanoscale TiC-strengthened Cu alloys fabricated by mechanical milling

Fenglin Wang, Yunping Li, Guoqiang Xie, Kimio Wakoh, Kenta Yamanaka, Yuichiro Koizumi, Akihiko Chiba

Materials Science and Engineering A　Vol. 668　p. 1-12　2016/06/21　Research paper (scientific journal)

Submicron lamellar porous structure formed by selective dissolution of Ti-Al alloy

Dai Xiu Wei, Yuichiro Koizumi, Yunping Li, Kenta Yamanak, Akihiko Chiba

Materials and Design　Vol. 98　p. 1-11　2016/05/15　Research paper (scientific journal)

Uneven damage on head and liner contact surfaces of a retrieved Co-Cr-based metal-on-metal hip joint bearing: An important reason for the high failure rate

Yuichiro Koizumi, Yan Chen, Yunping Li, Kenta Yamanaka, Akihiko Chiba, Shun Ichiro Tanaka, Yoshihiro Hagiwara

Materials Science and Engineering C　Vol. 62　p. 532-543　2016/05/01　Research paper (scientific journal)

Relationship between the microstructure and mechanical properties of an equiatomic AlCoCrFeNi high-entropy alloy fabricated by selective electron beam melting

Hiroshi Shiratori, Tadashi Fujieda, Kenta Yamanaka, Yuichiro Koizumi, Kosuke Kuwabara, Takahiko Kato, Akihiko Chiba

Materials Science and Engineering A　Vol. 656　p. 39-46　2016/02/22　Research paper (scientific journal)

In-situ fabrication and characterization of ultrafine structured Cu-TiC composites with high strength and high conductivity by mechanical milling

Fenglin Wang, Yunping Li, Xiaoyu Wang, Yuichiro Koizumi, Yamanaka Kenta, Akihiko Chiba

Journal of Alloys and Compounds　Vol. 657　No. 5　p. 122-132　2016/02/05　Research paper (scientific journal)

電子ビーム溶融(EBM)積層造形により作製されたCo-Cr-Mo合金の造形位置が及ぼす組織への影響

高島 大洋, 小泉 雄一郎, 李 云平, 山中 謙太, 齋藤 毅, 千葉 晶彦

粉体および粉末冶金　Vol. 63　No. 1　p. 10-16　2016/02/01　Research paper (scientific journal)

Effect of building position on phase distribution in Co-Cr-Mo alloy additive manufactured by EBM

Taiyo Takashima, Yuichiro Koizumi, Yunping Li, Kenta Yamanaka, Tsuyoshi Saito, Akihiko Chiba

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 63　No. 1　p. 10-16　2016/01/01　Research paper (scientific journal)

Analysis of Run-in-Stage Wear Behavior and Contact Mechanics of Metal-on-Metal Hip Joint Bearings with Different Radial Clearances

Yan Chen, Yunping Li, Shingo Kurosu, Qingen Meng, Ning Tang, Yuichiro Koizumi, Akihiko Chiba

MATERIALS TRANSACTIONS　Vol. 56　No. 6　p. 826-834　2015/12/31　Research paper (scientific journal)

Superthermostability of nanoscale TIC-reinforced copper alloys manufactured by a two-step ball-milling process

Fenglin Wang, Yunping Li, Xiandong Xu, Yuichiro Koizumi, Kenta Yamanaka, Huakang Bian, Akihiko Chiba

Philosophical Magazine　Vol. 95　No. 35　p. 4035-4053　2015/12/12　Research paper (scientific journal)

First demonstration of promising selective electron beam melting method for utilizing high-entropy alloys as engineering materials

Tadashi Fujieda, Hiroshi Shiratori, Kosuke Kuwabara, Takahiko Kato, Kenta Yamanaka, Yuichiro Koizumi, Akihiko Chiba

MATERIALS LETTERS　Vol. 159　p. 12-15　2015/11/01　Research paper (scientific journal)

Influence of Mo concentration on corrosion resistance to HF acid solution of Ni-Co-Cr-Mo alloys with and without Cu

Yuhang Hou, Yunping Li, Fenglin Wang, Chen Zhang, Yuichiro Koizumi, Akihiko Chiba

CORROSION SCIENCE　Vol. 99　p. 185-193　2015/10/01　Research paper (scientific journal)

Mechanisms of lamellar structure formation and Cr interfacial segregation in C11<inf>b</inf>-MoSi<inf>2</inf>/C40-NbSi<inf>2</inf> dual phase silicide verified by a phase-field simulation incorporating elastic inhomogeneity

Toshihiro Yamazaki, Yuichiro Koizumi, Koretaka Yuge, Akihiko Chiba, Koji Hagihara, Takayoshi Nakano, Kyosuke Kishida, Haruyuki Inui

Computational Materials Science　Vol. 108　p. 358-366　2015/10/01　Research paper (scientific journal)

Regulating the passive film of NiCoCrMo alloy in hydrofluoric acid solution by small addition of Cu

Yunping Li, Xiandong Xu, Yuhang Hou, Chen Zhang, Fenglin Wang, Kazuyo Omura, Yuichiro Koizumi, Akihiko Chiba

Corrosion Science　Vol. 98　p. 119-127　2015/09/01　Research paper (scientific journal)

Regulating the coarsening of the γ' phase in superalloys

Huakang Bian, Xiandong Xu, Yunping Li, Yuichiro Koizumi, Zhongchang Wang, Mingwei Chen, Kenta Yamanaka, Akihiko Chiba

NPG Asia Materials　Vol. 7　No. 8　p. e212-6 pages　2015/08/28　Research paper (scientific journal)

Control of γ lamella precipitation in Ti-39 at.% Al single crystals by nanogroove-induced dislocation bands

Dai Xiu Wei, Yuichiro Koizumi, Akinori Yamanaka, Masahiko Yoshino, Yungping Li, Akihiko Chiba

Acta Materialia　Vol. 96　p. 352-365　2015/06/29　Research paper (scientific journal)

Effects of alloyed Si on the oxidation behaviour of Co-29Cr-6Mo alloy for solid-oxide fuel cell interconnects

Phacharaphon Tunthawiroon, Yunping Li, Ning Tang, Yuichiro Koizumi, Akihiko Chiba

CORROSION SCIENCE　Vol. 95　p. 88-99　2015/06/01　Research paper (scientific journal)

Enhanced damping capacity of magnesium alloys by tensile twin boundaries

Yujie Cui, Yunping Li, Shihai Sun, Huakang Bian, Hua Huang, Zhongchang Wang, Yuichiro Koizumi, Akihiko Chiba

SCRIPTA MATERIALIA　Vol. 101　p. 8-11　2015/05/01　Research paper (scientific journal)

Low amount of Zr in electron beam melted CCM implants improves osseointegration

Patrik Stenlund, Shingo Kurosu, Yuichiro Koizumi, Felicia Suska, Hiroaki Matsumoto, Akihiko Chiba, Anders Palmquist

Additive Manufacturing　Vol. 6　p. 6-15　2015/04/01　Research paper (scientific journal)

Nano-lamellar/nano-tubular hierarchical porous structure produced by selective dissolution and anodization of lamellar Ti-40 at.% Al alloy

Dai-Xiu Wei, Yuichiro Koizumi, Huakang Bian, Yunping Li, Akihiko Chiba

MATERIALS LETTERS　Vol. 145　p. 15-18　2015/04/01　Research paper (scientific journal)

Osseointegration Enhancement by Zr doping of Co-Cr-Mo Implants Fabricated by Electron Beam Melting

Patrik Stenlund, Shingo Kurosu, Yuichiro Koizumi, Felicia Suska, Hiroaki Matsumoto, Akihiko Chiba, Anders Palmquist

Additive Manufacturing　Vol. 6　p. 6-15　2015/04/01　Research paper (scientific journal)

Phase and grain size inhomogeneity and their influences on creep behavior of Co-Cr-Mo alloy additive manufactured by electron beam melting

Shi-Hai Sun, Yuichiro Koizumi, Shingo Kurosu, Yun-Ping Li, Akihiko Chiba

ACTA MATERIALIA　Vol. 86　p. 305-318　2015/03/01　Research paper (scientific journal)

Ex-situ observation on the dissolution behaviour of Ni-16Cr-15Mo and Ni-30Co-16Cr-15Mo alloys in hydrofluoric acid

Yuhang Hou, Yunping Li, Emi Onodera, Chen Zhang, Yuichiro Koizumi, Akihiko Chiba

CORROSION SCIENCE　Vol. 90　p. 133-139　2015/01/01　Research paper (scientific journal)

Interface migration with segregation in MoSi<inf>2</inf>-based lamellar alloy simulated by phase-field method

Toshihiro Yamazaki, Yuichiro Koizumi, Akihiko Chiba, Koji Hagihara, Takayoshi Nakano, Koretaka Yuge, Kyosuke Kishida, Haruyuki Inui

Advanced Materials Research　Vol. 922　p. 832-837　2014/12/31　Research paper (international conference proceedings)

Effect of cobalt addition on the deformation and recrystallization textures of polycrystalline IN713C nickel based superalloy

J. Y. Song, S. Sato, Y. Koizumi, A. Chiba

Advanced Materials Research　Vol. 922　p. 711-715　2014/12/31　Research paper (international conference proceedings)

Effects of cold working on corrosion resistance of Co-modified Ni-16Cr-15Mo alloy in hydrofluoric acid solution

Yuhang Hou, Yunping Li, Chen Zhang, Yuichiro Koizumi, Akihiko Chiba

CORROSION SCIENCE　Vol. 89　p. 258-267　2014/12/01　Research paper (scientific journal)

Corrosion resistance of Cu- and Fe-modified Ni-30Co-16Cr-15Mo alloy in aqueous hydrofluoric acid

Chen Zhang, Yunping Li, Yuhang Hou, Ning Tang, Kazuyo Ohmura, Yuichiro Koizumi, Akihiko Chiba

CORROSION SCIENCE　Vol. 89　p. 81-92　2014/12/01　Research paper (scientific journal)

Role of strain-induced martensitic transformation on extrusion and intrusion formation during fatigue deformation of biomedical Co-Cr-Mo-N alloys

Takuya Mitsunobu, Yuichiro Koizumi, Byoung-Soo Lee, Kenta Yamanaka, Hiroaki Matsumoto, Yunping Li, Akihiko Chiba

ACTA MATERIALIA　Vol. 81　p. 377-385　2014/12/01　Research paper (scientific journal)

Mechanisms of Cr segregation to C11(b)/C40 lamellar interface in (Mo,Nb)Si-2 duplex silicide: A phase-field study to bridge experimental and first-principles investigations

Toshihiro Yamazaki, Yuichiro Koizumi, Koretaka Yuge, Akihiko Chiba, Koji Hagihara, Takayoshi Nakano, Kyosuke Kishida, Haruyuki Inui

INTERMETALLICS　Vol. 54　p. 232-241　2014/11/01　Research paper (scientific journal)

Thermo-mechanical fatigue test of a wrought Co-based alloy as potential tooling material for die casting

Ning Tang, Yunping Li, Phacharaphon Tunthawiroon, Yuichiro Koizumi, Akihiko Chiba

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 615　p. 164-168　2014/10/01　Research paper (scientific journal)

Cu-Ti-C alloy with high strength and high electrical conductivity prepared by two-step ball-milling processes

Fenglin Wang, Yunping Li, Kimio Wakoh, Yuichiro Koizumi, Akihiko Chiba

Materials and Design　Vol. 61　p. 70-74　2014/09/01　Research paper (scientific journal)

Cu-Ti-C alloy with high strength and high electrical conductivity prepared by two-step ball-milling processes

Fenglin Wang, Yunping Li, Kimio Wakoh, Yuichiro Koizumi, Akihiko Chiba

MATERIALS & DESIGN　Vol. 61　p. 70-74　2014/09/01　Research paper (scientific journal)

Nanoplastic deformation on Ti-39 at.% Al single crystals for manipulation of every single gamma lamella

Dai-Xiu Wei, Yuichiro Koizumi, Hiroaki Nishiyama, Akinori Yamanaka, Masahiko Yoshino, Shinpei Miyamoto, Kyosuke Yoshimi, Akihiko Chiba

ACTA MATERIALIA　Vol. 76　p. 331-341　2014/09/01　Research paper (scientific journal)

Cu-Ti-C alloy with high strength and high electrical conductivity prepared by two-step ball-milling processes

Fenglin Wang, Yunping Li, Kimio Wakoh, Yuichiro Koizumi, Akihiko Chiba

MATERIALS & DESIGN　Vol. 61　p. 70-74　2014/09/01　Research paper (scientific journal)

Collective behavior of strain-induced martensitic transformation (SIMT) in biomedical Co-Cr-Mo-N alloy polycrystal: An ex-situ electron backscattering diffraction study

Byoung-Soo Lee, Yuichiro Koizumi, Hiroaki Matsumoto, Akihiko Chiba

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 611　p. 263-273　2014/08/01　Research paper (scientific journal)

Hot forging characteristic of Ti-5Al-5V-5Mo-3Cr alloy with single metastable beta microstructure

Hiroaki Matsumoto, Masami Kitamura, Yunping Li, Yuichiro Koizumi, Akihiko Chiba

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 611　p. 337-344　2014/08/01　Research paper (scientific journal)

Effects of Al, Ti, and Zr doping on oxide film formation in Co-29Cr-6Mo alloy used as mould material for Al die-casting

Yunping Li, Phacharaphon Tunthawiroon, Ning Tang, Huakang Bian, Fenglin Wang, Shihai Sun, Yan Chen, Kazuyo Omura, Yuichiro Koizumi, Akihiko Chiba

CORROSION SCIENCE　Vol. 84　p. 147-158　2014/07/01　Research paper (scientific journal)

Nitriding of Co-Cr-Mo alloy in nitrogen

Ning Tang, Yunping Li, Yuichiro Koizumi, Akihiko Chiba

MATERIALS CHEMISTRY AND PHYSICS　Vol. 145　No. 3　p. 350-356　2014/06/01　Research paper (scientific journal)

The hot forging behaviour and its effects on the oxidation behaviour of W-Cr alloy

Yunping Li, Peng Li, Huakang Bian, Ning Tang, Yuichiro Koizumi, Akihiko Chiba

CORROSION SCIENCE　Vol. 83　p. 367-374　2014/06/01　Research paper (scientific journal)

Detwining in Mg alloy with a high density of twin boundaries

Yunping Li, Yujie Cui, Huakang Bian, Shihai Sun, Ning Tang, Yan Chen, Bin Liu, Yuichiro Koizumi, Akihiko Chiba

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS　Vol. 15　No. 3　2014/06/01　Research paper (scientific journal)

Prototyping of Co-Cr-Mo alloy flat spiral spring by electron beam melting

Yuichiro Koizumi, Shi Hai Sun, Tsuyoshi Saito, Shingo Kurosu, Akihiko Chiba

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 61　No. 5　p. 243-249　2014/05/01　Research paper (scientific journal)

Prototyping of Co-Cr-Mo alloy flat spiral spring by electron beam melting

Yuichiro Koizumi, Shi Hai Sun, Tsuyoshi Saito, Shingo Kurosu, Akihiko Chiba

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 61　No. 5　p. 243-249　2014/05/01　Research paper (scientific journal)

Effect of phase transformation on tensile behavior of Co-Cr-Mo alloy fabricated by electron-beam melting

Shi Hai Sun, Yuichiro Koizumi, Shingo Kurosu, Yun Ping Li, Akihiko Chiba

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 61　No. 5　p. 234-242　2014/05/01　Research paper (scientific journal)

Effect of phase transformation on tensile behavior of Co-Cr-Mo alloy fabricated by electron-beam melting

Shi Hai Sun, Yuichiro Koizumi, Shingo Kurosu, Yun Ping Li, Akihiko Chiba

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 61　No. 5　p. 234-242　2014/05/01　Research paper (scientific journal)

Local strain evolution due to athermal gamma -&gt; epsilon martensitic transformation in biomedical Co-Cr-Mo alloys

Kenta Yamanaka, Manami Mori, Yuichiro Koizumi, Akihiko Chiba

JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS　Vol. 32　p. 52-61　2014/04/01　Research paper (scientific journal)

Asymmetric slip trace formation in tension/compression cyclic deformation of biomedical Co-Cr-Mo-N alloy with negative stacking fault energy

Takuya Mitsunobu, Yuichiro Koizumi, Byoung-Soo Lee, Akihiko Chiba

SCRIPTA MATERIALIA　Vol. 74　p. 52-55　2014/03/01　Research paper (scientific journal)

Build direction dependence of microstructure and high-temperature tensile property of Co-Cr-Mo alloy fabricated by electron beam melting

Shi-Hai Sun, Yuichiro Koizumi, Shingo Kurosu, Yun-Ping Li, Hiroaki Matsumoto, Akihiko Chiba

ACTA MATERIALIA　Vol. 64　p. 154-168　2014/02/01　Research paper (scientific journal)

Microscopic mechanism of plastic deformation in a polycrystalline Co-Cr-Mo alloy with a single hcp phase

Hiroaki Matsumoto, Yuichiro Koizumi, Tetsuya Ohashi, Byong-Soo Lee, Yunping Li, Akihiko Chiba

ACTA MATERIALIA　Vol. 64　p. 1-11　2014/02/01　Research paper (scientific journal)

Effects of sigma phase and carbide on the wear behavior of CoCrMo alloys in Hanks' solution

Yan Chen, Yunping Li, Shingo Kurosu, Kenta Yamanaka, Ning Tang, Yuichiro Koizumi, Akihiko Chiba

WEAR　Vol. 310　No. 1月2日　p. 51-62　2014/02/01　Research paper (scientific journal)

Effects of partially substituting cobalt for nickel on the corrosion resistance of a Ni-16Cr-15Mo alloy to aqueous hydrofluoric acid

Yunping Li, Xiuru Fan, Ning Tang, Huakang Bian, Yuhang Hou, Yuichiro Koizumi, Akihiko Chiba

CORROSION SCIENCE　Vol. 78　p. 101-110　2014/01/01　Research paper (scientific journal)

Effect of nitriding treatment on corrosion behaviour of Co-Cr-Mo alloy in liquid Al

Ning Tang, Yunping Li, Yuichiro Koizumi, Akihiko Chiba

Corrosion Science　Vol. 78　p. 244-250　2014/01/01　Research paper (scientific journal)

Effects of partially substituting cobalt for nickel on the corrosion resistance of a Ni-16Cr-15Mo alloy to aqueous hydrofluoric acid

Yunping Li, Xiuru Fan, Ning Tang, Huakang Bian, Yuhang Hou, Yuichiro Koizumi, Akihiko Chiba

CORROSION SCIENCE　Vol. 78　p. 101-110　2014/01/01　Research paper (scientific journal)

Phase-field simulation of lamellar structure formation in MoSi <inf>2</inf>/NbSi<inf>2</inf> duplex suicide

Yuichiro Koizumi, Toshihiro Yamazaki, Akihiko Chiba, Koji Hagihara, Takayoshi Nakano, Koretaka Yuge, Kyosuke Kishida, Haruyuki Inui

Materials Research Society Symposium Proceedings　Vol. 1516　p. 309-315　2013/12/31　Research paper (international conference proceedings)

Phase-field study on the segregation mechanism of additive elements in NbSi<inf>2</inf>/MoSi<inf>2</inf> duplex suicide

Toshihiro Yamazaki, Yuichiro Koizumi, Akihiko Chiba, Koji Hagihara, Takayoshi Nakano, Koretaka Yuge, Kyosuke Kishida, Haruyuki Inui

Materials Research Society Symposium Proceedings　Vol. 1516　p. 145-150　2013/12/31　Research paper (international conference proceedings)

Modeling Grain Boundary Motion and Dynamic Recrystallization in Pure Metals

Julien Favre, Damien Fabregue, David Piot, Ning Tang, Yuichiro Koizumi, Eric Maire, Akihiko Chiba

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　Vol. 44A　No. 13　p. 5861-5875　2013/12/01　Research paper (scientific journal)

Cr segregation at C11(b)/C40 interface in MoSi2-based alloys: A first-principles study

Koretaka Yuge, Kyosuke Kishida, Haruyuki Inui, Yuichiro Koizumi, Koji Hagihara, Takayoshi Nakano

INTERMETALLICS　Vol. 42　p. 165-169　2013/11/01　Research paper (scientific journal)

Microstructure evolution of SUS303 free-cutting steel during hot compression process

Yunping Li, Teppei Suzuki, Ning Tang, Yuichiro Koizumi, Akihiko Chiba

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 583　p. 161-168　2013/10/01　Research paper (scientific journal)

Interfacial reaction between Co-Cr-Mo alloy and liquid Al

Ning Tang, Yunping Li, Yuichiro Koizumi, Shingo Kurosu, Akihiko Chiba

CORROSION SCIENCE　Vol. 75　p. 262-268　2013/10/01　Research paper (scientific journal)

Microstructure evolution of SUS303 free-cutting steel during hot compression process

Yunping Li, Teppei Suzuki, Ning Tang, Yuichiro Koizumi, Akihiko Chiba

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 583　p. 161-168　2013/10/01　Research paper (scientific journal)

Experimental and theoretical research on interfacial reaction of solid Co with liquid Al

Ning Tang, Yunping Li, Yuichiro Koizumi, Shingo Kurosu, Akihiko Chiba

CORROSION SCIENCE　Vol. 73　p. 54-61　2013/08/01　Research paper (scientific journal)

Characterisation of oxide films formed on Co-29Cr-6Mo alloy used in die-casting moulds for aluminium

Yunping Li, Ning Tang, Phacharaphon Tunthawiroon, Yuichiro Koizumi, Akihiko Chiba

CORROSION SCIENCE　Vol. 73　p. 72-79　2013/08/01　Research paper (scientific journal)

Microstructures developed by super-rapid induction heating-and-quenching (SRIHQ) of Fe-1.4%Cr-1%C pearlitic steel

Yuichiro Koizumi, Takeshi Otsuka, Yoritoshi Minamino, Takemori Takayama, Masanori Ueyama, Takeshi Daio, Satoshi Hata

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 577　p. 29-35　2013/08/01　Research paper (scientific journal)

Tribological properties of carbon/carbon composites with various pyrolytic carbon microstructures

Shu Yu, Fuqing Zhang, Xiang Xiong, Yunping Li, Ning Tang, Yuichiro Koizumi, Akihiko Chiba

Wear　Vol. 304　No. 1月2日　p. 103-108　2013/07/05　Research paper (scientific journal)

Tribological properties of carbon/carbon composites with various pyrolytic carbon microstructures

Shu Yu, Fuqing Zhang, Xiang Xiong, Yunping Li, Ning Tang, Yuichiro Koizumi, Akihiko Chiba

Wear　Vol. 304　No. 1月2日　p. 103-108　2013/07/05　Research paper (scientific journal)

Deformation Behavior and Dynamic Recrystallization of Biomedical Co-Cr-W-Ni (L-605) Alloy

Julien Favre, Yuichiro Koizumi, Akihiko Chiba, Damien Fabregue, Eric Maire

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　Vol. 44A　No. 6　p. 2819-2830　2013/06/01　Research paper (scientific journal)

Strain-induced martensitic transformation near twin boundaries in a biomedical Co-Cr-Mo alloy with negative stacking fault energy

Yuichiro Koizumi, Sho Suzuki, Kenta Yamanaka, Byoung-Soo Lee, Kazuhisa Sato, Yunping Li, Shingo Kurosu, Hiroaki Matsumoto, Akihiko Chiba

ACTA MATERIALIA　Vol. 61　No. 5　p. 1648-1661　2013/03/01　Research paper (scientific journal)

Grain refinement due to complex twin formation in rapid hot forging of magnesium alloy

Yunping Li, Shuo Wu, Huakang Bian, Ning Tang, Bin Liu, Yuichiro Koizumi, Akihiko Chiba

Scripta Materialia　Vol. 68　No. 3月4日　p. 171-174　2013/02/01　Research paper (scientific journal)

Quantitative evaluation in hot workability of SUS303 free-cutting steel

Teppei Suzuki, Yunping Li, Yuichiro Koizumi, Akihiko Chiba

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 563　p. 117-124　2013/02/01　Research paper (scientific journal)

Selective pore growth on lamellar Ti-41 at.%Al alloy

Hiroaki Tsuchiya, Toshifumi Akaki, Yuichiro Koizumi, Yoritoshi Minamino, Shinji Fujimoto

ELECTROCHEMISTRY COMMUNICATIONS　Vol. 26　p. 117-120　2013/01/01　Research paper (scientific journal)

Evaluation of Ordering Mobility from Antiphase Boundary Mobility in Fe3Al Using Phase-field Simulation

Yuichiro Koizumi, Samuel Miller Allen, Masayuki Ouchi, Yoritoshi Minamino

ISIJ INTERNATIONAL　Vol. 52　No. 9　p. 1678-1682　2012/12/31　Research paper (scientific journal)

Dynamic recrystallization of biomedical Co-Cr-W-Ni (L-605) alloy

Julien Favre, Akihiko Chiba, Yuichiro Koizumi, Damien Fabregue, Eric Maire

THERMEC 2011, PTS 1-4　Vol. 706-709　p. 472-+　2012/12/31　Research paper (international conference proceedings)

Recrystallization of L-605 Cobalt Superalloy during Hot-Working Process

Julien Favre, Yuichiro Koizumi, Akihiko Chiba, Damien Fabregue, Eric Maire

3RD INTERNATIONAL SYMPOSIUM ON HIGH-TEMPERATURE METALLURGICAL PROCESSING　p. 257-264　2012/12/31　Research paper (international conference proceedings)

Dynamic strain aging in biomedical Co-Cr-Mo-based alloys with nitrogen doping

Kenta Yamanaka, Manami Mori, Yunping Li, Yuichiro Koizumi, Akihiko Chiba

MATERIALS INTEGRATION　Vol. 508　p. 141-+　2012/12/31　Research paper (international conference proceedings)

Enhanced Grain Refinement Through Deformation Induced a Precipitation in Hot Working of a? plus ?ss Titanium Alloy

Bin Liu, Yunping Li, Hiroaki Matsumoto, Yuichiro Koizumi, Yong Liu, Akihiko Chiba

ADVANCED ENGINEERING MATERIALS　Vol. 14　No. 9　p. 785-789　2012/09/01　Research paper (scientific journal)

Retraction notice to: Phase-field simulation of Suzuki segregation in Co–Ni-based superalloy with Nb-addition [Intermetallics 27C (2012) 52–57] (Intermetallics (2012) 27C(52–57) (S0966979512000209), (10.1016/j.intermet.2012.01.008))

Yuichiro Koizumi, Shou Suzuki, Takuma Otomo, Shingo Kurosu, Yunping Li, Hiroaki Matsumoto, Akihiko Chiba

Intermetallics　Vol. 27　2012/08/01　Research paper (scientific journal)

Phase-field simulation of Suzuki segregation in Co-Ni-based superalloy with Nb-addition

Yuichiro Koizumi, Shou Suzuki, Takuma Otomo, Shingo Kurosu, Yunping Li, Hiroaki Matsumoto, Akihiko Chiba

Intermetallics　Vol. 27　p. 52-57　2012/08/01　Research paper (scientific journal)

Interfacial reactions of solid Co and solid Fe with liquid Al

N. Tang, Y. P. Li, S. Kurosu, Y. Koizumi, H. Matsumoto, A. Chiba

CORROSION SCIENCE　Vol. 60　p. 32-37　2012/07/01　Research paper (scientific journal)

Dynamic Phase Transformation during Hot-Forging Process of a Powder Metallurgy alpha+beta Titanium Alloy

B. Liu, H. Matsumoto, Y. P. Li, Y. Koizumi, Y. Liu, A. Chiba

MATERIALS TRANSACTIONS　Vol. 53　No. 5　p. 1007-1010　2012/05/01　Research paper (scientific journal)

First-principles study on phase stability of MoSi 2-NbSi 2 pseudobinary alloys

Koretaka Yuge, Yuichiro Koizumi, Koji Hagihara, Takayoshi Nakano, Kyosuke Kishida, Haruyuki Inui

Physical Review B - Condensed Matter and Materials Physics　Vol. 85　No. 13　2012/04/16　Research paper (scientific journal)

Suzuki segregation in Co-Ni-based superalloy at 973 K: An experimental and computational study by phase-field simulation

Yuichiro Koizumi, Takeshi Nukaya, Sho Suzuki, Shingo Kurosu, Yunping Li, Hiroaki Matsumoto, Kazuhisa Sato, Yuji Tanaka, Akihiko Chiba

ACTA MATERIALIA　Vol. 60　No. 6月7日　p. 2901-2915　2012/04/01　Research paper (scientific journal)

First-principles study on phase stability of MoSi2-NbSi2 pseudobinary alloys

Koretaka Yuge, Yuichiro Koizumi, Koji Hagihara, Takayoshi Nakano, Kyosuke Kishida, Haruyuki Inui

PHYSICAL REVIEW B　Vol. 85　No. 13　2012/04/01　Research paper (scientific journal)

Role of nitrogen addition in stabilizing the gamma phase of Biomedical Co-29Cr-6Mo alloy

Y. P. Li, J. S. Yu, S. Kurosu, Y. Koizumi, H. Matsumoto, A. Chiba

MATERIALS CHEMISTRY AND PHYSICS　Vol. 133　No. 1　p. 29-32　2012/03/01　Research paper (scientific journal)

D03型Fe3Al金属間化合物中の規則ドメイン成長のフェーズフィールドシミュレーション

小泉雄一郎, 井達矢, 大内允之, 南埜宜俊, 吉矢真人, 千葉晶彦

材料とプロセス (CAMP-ISIJ)　Vol. 25　2012/03/01　Research paper (other academic)

Phase-field simulation of antiphase boundary migration in intermetallic compounds with solute and vacancy segregation

Yuichiro Koizumi, Tatsuya Yokoi, Masayuki Ouchi, Yoritoshi Minamino, Yoshiya Masato, Samuel M. Allen

Materials Research Society Symposium Proceedings　Vol. 1295　p. 437-442　2011/12/31　Research paper (international conference proceedings)

Static recrystallization behavior of Co-Ni-Cr-Mo superalloy after cold rolling and subsequent heat treatment

Takuma Otomo, Shingo Kurosu, Yunping Li, Hiroaki Matsumoto, Shigeo Sato, Yuichiro Koizumi, Kazuaki Wagatsuma, Akihiko Chiba

TMS2011 SUPPLEMENTAL PROCEEDINGS, VOL 3: GENERAL PAPER SELECTIONS　p. 479-483　2011/12/31　Research paper (international conference proceedings)

Deformation behavior of biomedical Co-Cr-Mo alloy

Hiroaki Matsumoto, Shingo Kurosu, Byoung-Soo Lee, Yunping Li, Yuichiro Koizumi, Akihiko Chiba

TMS2011 SUPPLEMENTAL PROCEEDINGS, VOL 3: GENERAL PAPER SELECTIONS　Vol. 3　p. 433-437　2011/12/31　Research paper (international conference proceedings)

Development of Novel Methods for Compensation of Stress-strain Curves

Yun Ping Li, Emi Onodera, Hiroaki Matsumoto, Yuichiro Koizumi, Shu Yu, Akihiko Chiba

ISIJ INTERNATIONAL　Vol. 51　No. 5　p. 782-787　2011/12/31　Research paper (scientific journal)

PHASE-FIELD SIMULATION OF SEGREGATION TO STACKING FAULT (SUZUKI EFFECT) IN Co-Ni-BASED SUPERALLOY

Y. Koizumi, S. Suzuki, T. Otomo, S. Kurosu, Y. P. Li, H. Matsumoto, A. Chiba

TMS2011 SUPPLEMENTAL PROCEEDINGS, VOL 2: MATERIALS FABRICATION, PROPERTIES, CHARACTERIZATION, AND MODELING　Vol. 2　p. 409-416　2011/12/31　Research paper (international conference proceedings)

Development of Novel Methods for Compensation of Stress-strain Curves

Yun Ping Li, Emi Onodera, Hiroaki Matsumoto, Yuichiro Koizumi, Shu Yu, Akihiko Chiba

ISIJ INTERNATIONAL　Vol. 51　No. 5　p. 782-787　2011/12/31　Research paper (scientific journal)

Phase-field Simulation of D0(3)-type Antiphase Boundary Migration in Fe3Al with Vacancy and Solute Segregation

Yuichiro Koizumi, Samuel M. Allen, Masayuki Ouchi, Yoritoshi Minamino, Akihiko Chiba

SOLID-SOLID PHASE TRANSFORMATIONS IN INORGANIC MATERIALS, PTS 1-2　Vol. 172-174　p. 1313-+　2011/12/31　Research paper (international conference proceedings)

Effect of impurity atoms on alpha(2)/gamma lamellar interfacial misfit in Ti-Al alloy: a systematic first principles study

Yuichiro Koizumi, Masato Yoshiya, Atsushi Sugihara, Yoritoshi Minamino

PHILOSOPHICAL MAGAZINE　Vol. 91　No. 28　p. 3685-3704　2011/12/31　Research paper (scientific journal)

Interfacial reactions between molten Al and a Co-Cr-Mo alloy with and without oxidation treatment

N. Tang, Y. P. Li, S. Kurosu, H. Matsumoto, Y. Koizumi, A. Chiba

CORROSION SCIENCE　Vol. 53　No. 12　p. 4324-4326　2011/12/01　Research paper (scientific journal)

Construction of Processing Map for Biomedical Co-29Cr-6Mo-0.23C-0.14N Alloy by Using Compression Tests

Yui Yamashita, Yunping Li, Hiroaki Matsumoto, Yuichiro Koizumi, Akihiko Chiba

MATERIALS TRANSACTIONS　Vol. 52　No. 4　p. 780-786　2011/04/01　Research paper (scientific journal)

Construction of Processing Map for Biomedical Co-29Cr-6Mo-0.23C-0.14N Alloy by Using Compression Tests

Yui Yamashita, Yunping Li, Hiroaki Matsumoto, Yuichiro Koizumi, Akihiko Chiba

MATERIALS TRANSACTIONS　Vol. 52　No. 4　p. 780-786　2011/04/01　Research paper (scientific journal)

Phase-Field Simulation of Antiphase Boundary Migration in Slightly Off-stoichiometric Fe3Al with Solute and Vacancy Segregation

Yuichiro Koizumi, Masayuki Ouchi, Yoritoshi Minamino, Samuel M. Allen

Transaction of Materials Research Society Japan　Vol. 35　No. 2　p. 209-215　2010/12/31　Research paper (scientific journal)

Effects of substitutional impurity Au and Si atoms on antiphase boundary energies in Ti3Al: A first principles study

Yuichiro Koizumi, Masataka Mizuno, Atsushi Sugihara, Yoritoshi Minamino, Yasuharu Shirai

PHILOSOPHICAL MAGAZINE　Vol. 90　No. 29　p. 3919-3934　2010/12/31　Research paper (scientific journal)

Effects of solute and vacancy segregation on antiphase boundary migration in stoichiometric and Al-rich Fe3Al: A phase-field simulation study

Yuichiro Koizumi, Samuel M. Allen, Masayuki Ouchi, Yoritoshi Minamino

INTERMETALLICS　Vol. 18　No. 7　p. 1297-1302　2010/07/01　Research paper (scientific journal)

Selective dissolution of nanolamellar Ti-41 at.% Al alloy single crystals

Yuichiro Koizumi, Atsushi Sugihara, Hiroaki Tsuchiya, Yoritoshi Minamino, Shinji Fujimoto, Hideyuki Yasuda, Masato Yoshiya

ACTA MATERIALIA　Vol. 58　No. 8　p. 2876-2886　2010/05/01　Research paper (scientific journal)

Effects of plastic deformation on lamellar structure formation in Ti-39 at.% Al single crystals

Y. Koizumi, T. Fujita, Y. Minamino, S. Hata

ACTA MATERIALIA　Vol. 58　No. 3　p. 1104-1115　2010/02/01　Research paper (scientific journal)

Magneto-mechanical and Pseudoelastic Damping of Fe-Al Based Single Crystals

Hiroyuki Y. Yasuda, Kouki Fukushima, Yuichiro Koizumi, Yoritoshi Minamino, Yukichi Umakoshi

ISIJ INTERNATIONAL　Vol. 49　No. 10　p. 1630-1635　2009/12/31　Research paper (scientific journal)

Diffusion of Au in the Intermetallic Compound Ti3Al

Y. Koizumi, T. Tanaka, Y. Minamino

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　Vol. 40A　No. 12　p. 2919-2926　2009/12/01　Research paper (scientific journal)

Metallurgical aspects on the formation of self-organized anodic oxide nanotube layers

Hiroaki Tsuchiya, Toshifumi Akaki, Junji Nakata, Daisuke Terada, Nobuhiro Tsuji, Yuichiro Koizumi, Yoritoshi Minamino, Patrik Schmuki, Shinji Fujimoto

ELECTROCHIMICA ACTA　Vol. 54　No. 22　p. 5155-5162　2009/09/01　Research paper (scientific journal)

Anodic oxide nanotube layers on Ti-Ta alloys: Substrate composition, microstructure and self-organization on two-size scales

Hiroaki Tsuchiya, Toshifumi Akaki, Junji Nakata, Daisuke Terada, Nobuhiro Tsuji, Yuichiro Koizumi, Yoritoshi Minamino, Patrik Schmuki, Shinji Fujimoto

CORROSION SCIENCE　Vol. 51　No. 7　p. 1528-1533　2009/07/01　Research paper (scientific journal)

Effects of solute and vacancy segregation on migration of a/4 &lt; 1 1 1 &gt; and a/2 &lt; 1 0 0 &gt; antiphase boundaries in Fe3Al

Yuichiro Koizumi, Samuel M. Allen, Yoritoshi Minamino

ACTA MATERIALIA　Vol. 57　No. 10　p. 3039-3051　2009/06/01　Research paper (scientific journal)

Anomalous growth of antiphase domains in Ti3Al

Yuichiro Koizumi, Takeshi Fujita, Yoritoshi Minamino

SCRIPTA MATERIALIA　Vol. 60　No. 3　p. 144-147　2009/02/01　Research paper (scientific journal)

Oxygen diffusion in Ti3Al single crystals

Y. Koizumi, M. Kishimoto, Y. Minamino, H. Nakajima

PHILOSOPHICAL MAGAZINE　Vol. 88　No. 24　p. 2991-3010　2008/12/31　Research paper (scientific journal)

Strain-Assisted Formation of Nano-scaled Lamellar Structure in Ti-39at%Al Single crystals

Yuichiro Koizumi, Takayuki Tanaka, Takeshi Fujita, Yoritoshi Minamino

Materials Research Society Symposium Proceedings　Vol. 1059　2008/12/31　Research paper (international conference proceedings)

Additivity of Hardening by Nanolamellar Structure and Antiphase Domain in Ti-39at%Al Single Crystals

Yuichiro Koizumi, Minamino Yoritoshi, Takayuki Tanaka, Kazuki Iwamoto

Materials Research Society Symposium Proceedings　Vol. 1086　2008/12/31　Research paper (international conference proceedings)

Solute and vacancy segregation to a/4 &lt; 111 &gt; and a/2 &lt; 100 &gt; antiphase domain boundaries in Fe(3)Al

Yuichiro Koizumi, Samuel M. Allen, Yoritoshi Minamino

ACTA MATERIALIA　Vol. 56　No. 19　p. 5861-5874　2008/11/01　Research paper (scientific journal)

Evolution of antiphase domain (APD)/lamella mixed microstructure in Ti-39 at%Al single crystals

Yuichiro Koizumi, Kazuki Iwamoto, Takayuki Tanaka, Nobuhiro Tsuji, Yoritoshi Minamino

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 478　No. 1月2日　p. 147-153　2008/04/01　Research paper (scientific journal)

Effects of antiphase domains on dislocation motion in Ti3Al single crystals deformed by prism slip

Y. Koizumi, Y. Minamino, T. Nakano, Y. Umakoshi

PHILOSOPHICAL MAGAZINE　Vol. 88　No. 4　p. 465-488　2008/02/01　Research paper (scientific journal)

Reaction of Sn to nanocrystalline surface layer of Cu by near surface severe plastic deformation

Y. Minamino, Y. Koizumi, N. Tsuji, Y. Nakamizo, T. Shibayanagi, M. Naka

Solid State Phenomena　Vol. 127　p. 115-120　2007/12/31　Research paper (international conference proceedings)

Reaction of Sn to nanocrystalline surface layer of Cu by near surface severe plastic deformation

Y. Minamino, Y. Koizumi, N. Tsuji, Y. Nakamizo, T. Shibayanagi, M. Naka

DESIGNING OF INTERFACIAL STRUCTURES IN ADVANCED MATERIALS AND THEIR JOINTS　Vol. 127　p. 115-+　2007/12/31　Research paper (international conference proceedings)

Relation between Thermal Conductivity and Electrical Conductivity in Copper and Copper Alloys

Toshimi Yamane, Yoritoshi Minamino, Tomoshi Takahashi, Keiichi Hirao, Yuichiro Koizumi

Journal of the JRICu　Vol. 46　No. 1　p. 177-180　2007/12/31　Research paper (scientific journal)

Evolution of antiphase domains and gamma lamellae in Ti-39at%Al single crystals

Yuichiro Koizumi, Kazuki Iwamoto, Takayuki Tanaka, Yoritoshi Minamino, Nobuhiro Tsuji

ADVANCED INTERMETALLIC-BASED ALLOYS　Vol. 980　p. 377-+　2007/12/31　Research paper (international conference proceedings)

Enhancement of reaction of zinc on superficially nanocrystallized IF steel by near surface-severe plastic deformation

Y Minamino, N Tsuji, Y Koizumi, Y Nakamizo, M Sato, T Shibayanagi, M Naka

ADVANCED STRUCTURAL AND FUNCTIONAL MATERIALS DESIGN, PROCEEDINGS　Vol. 512　p. 361-366　2006/12/31　Research paper (scientific journal)

Energies of conservative and non-conservative antiphase boundaries in Ti3Al: a first principles study

Y Koizumi, S Ogata, Y Minamino, N Tsuji

PHILOSOPHICAL MAGAZINE　Vol. 86　No. 9　p. 1243-1259　2006/03/01　Research paper (scientific journal)

Diffusion of Si in Ti(3)Al intermetallic compound

Y Koizumi, Y Sakakibara, Y Minamino, N Tsuji

DIFFUSION IN MATERIALS: DIMAT 2004, PTS 1 AND 2　Vol. 237-240　p. 334-339　2005/12/31　Research paper (scientific journal)

Diffusion reactivity between zinc plate layer and nanocrystalline surface layer of IF steel by near surface-severe plastic deformation

Y Minamino, N Tsuji, Y Koizumi, Y Nakamizo, M Sato, T Shibayanagi, M Naka

NEW FRONTIERS OF PROCESSING AND ENGINEERING IN ADVANCED MATERIALS　Vol. 502　p. 117-122　2005/12/31　Research paper (scientific journal)

Bulk Fe-Al-C nanoalloys made by mechanically alloying with subsequent spark plasma sintering and their mechanical properties

Y Minamino, Y Koizumi, N Tsuji, N Hirohata, Mizuuchi, I, Y Ohkanda

BULK AND GRADED NANOMETALS　Vol. 101-102　p. 103-110　2005/12/31　Research paper (scientific journal)

Evolution of Antiphase Domain (APD)/Nanolamellar Complex Structure in Ti-Al Single Crystals

Yuichiro Koizumi, Kazuli Iwamoto, Nobuhiro Tsuji, Yoritoshi Minamino

Proceedings of Materials Science & Technology 2005 (Integration of Theoretical, Computational and Experimental Studies of Interfaces and Microstructural Evolution, Organized by G.S. Rohrer, A.S. Karma, P.P. Wynblatt, A.D. Rollett, D.J. Srolovitz, D. Farka　Vol. 3　p. 39-46　2005/12/31　Research paper (international conference proceedings)

Effect of excess vacancies on antiphase domain growth in Fe3Al

Y Koizumi, T Hagiwara, Y Minamino, N Tsuji

Integrative and Interdisciplinary Aspects of Intermetallics　Vol. 842　p. 53-58　2005/12/31　Research paper (international conference proceedings)

Internal friction of ultrafine-grained nickel produced by Accumulative Roll-Bonding(ARB)

Y Koizumi, M Ueyama, N Tsuji, Y Minamino, K Ota

JOURNAL OF THE JAPAN INSTITUTE OF METALS　Vol. 69　No. 11　p. 997-1003　2005/11/01　Research paper (scientific journal)

Yield-Drop Phenomenon and Luders Deformation in Pure Aluminum Having Ultrafine Grained Microstructures

M.Hishida,, N.Tsuji,, Y.Koizumi,, Y.Minamino,, H.Nakashima,, F.Yoshida,, K.Yamad,

2004/12/31　Research paper (scientific journal)

Effect of Dynamic Recrystallization on Diffusion Bonding of Ni3Al Intermetallic Compound

Yuichiro Koizumi, Yoritoshi Minamino, Yasuhiro Inui

Journal of High Temperature Society　Vol. 30　No. 4　p. 204-212　2004/12/31　Research paper (scientific journal)

Structure of martensite transformed from severely deformed austenite in Fe-28.5at.%Ni

H Kitahara, T Kimura, N Tsuji, Y Koizumi, Y Minamino

ULTRAFINE GRAINED MATERIALS III　p. 369-374　2004/12/31　Research paper (international conference proceedings)

Microstructure and mechanical properties of ultrafine grained low carbon steel fabricated by conventional cold-rolling and annealing of martensite (martensite process)

R Ueji, N Tsuji, Y Minamino, Y Koizumi

ULTRAFINE GRAINED MATERIALS III　p. 143-148　2004/12/31　Research paper (international conference proceedings)

Surface nanocrystalline metallic materials fabricated by near surface severe plastic deformation

N Tsuji, M Sato, Y Minamino, Y Koizumi

SURFACES AND INTERFACES IN NANOSTRUCTURED MATERIALS AND TRENDS IN LIGA, MINIATURIZATION, AND NANOSCALE MATERIALS　p. 93-101　2004/12/31　Research paper (international conference proceedings)

Martensite Transformed from Ultrafine Grained Austenite Fabricated by ARB Process in 29.6wt%Ni Steel

Hiromoto Kitahara, Nobuhiro Tsuji, Takashi Kimura, Yuichiro Koizumi, Yoritoshi Minamino

Proc. of the 2nd Int. Conf. on Advanced Structural Steels (ICASS), April 14-16, 2004, Shanghai　Vol. 1　p. 227-231　2004/12/31　Research paper (international conference proceedings)

Toughness of ultrafine grained ferritic steels fabricated by ARB and annealing process

N Tsuji, S Okuno, Y Koizumi, Y Minamino

MATERIALS TRANSACTIONS　Vol. 45　No. 7　p. 2272-2281　2004/07/01　Research paper (scientific journal)

Formation of nanocrystalline surface layers in various metallic materials by near surface severe plastic deformation

M Sato, N Tsuji, Y Minamino, Y Koizumi

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS　Vol. 5　No. 1月2日　p. 145-152　2004/01/01　Research paper (scientific journal)

Microstructures and mechanical properties of bulk nanocrystalline Fe-Al-C alloys made by mechanically alloying with subsequent spark plasma sintering

Y Minamino, Y Koizumi, N Tsuji, N Hirohata, K Mizuuchi, Y Ohkanda

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS　Vol. 5　No. 1月2日　p. 133-143　2004/01/01　Research paper (scientific journal)

Effect of rolling reduction on ultrafine grained structure and mechanical properties of low-carbon steel thermomechanically processed from martensite starting structure

R Ueji, N Tsuji, Y Minamino, Y Koizumi

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS　Vol. 5　No. 1月2日　p. 153-162　2004/01/01　Research paper (scientific journal)

Growth kinetics of antiphase domain in Ti3Al intermetallic compound

Y Koizumi, H Katsumura, Y Minamino, N Tsuji, JG Lee, H Mori

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS　Vol. 5　No. 1月2日　p. 19-28　2004/01/01　Research paper (scientific journal)

Effect of antiphase domain boundaries on prism slip in Ti3Al single crystals

Y Koizumi, Y Minamino, N Tsuji, T Nakano, Y Umakoshi

DEFECT PROPERTIES AND RELATED PHENOMENA IN INTERMETALLIC ALLOYS　Vol. 753　p. 267-272　2003/12/31　Research paper (international conference proceedings)

Fabrication of surface nanocrystalline aluminum alloys

M. Sato, N. Tsuji, Y. Minamino, Y. Koizumi

Materials Science Forum　Vol. 426-432　No. 3　p. 2753-2758　2003/12/31　Research paper (international conference proceedings)

Mechanical properties as a function of grain size in ultrafine grained aluminum and iron fabricated by ARB and annealing process

N Tsuji, S Okuno, T Matsuura, Y Koizumi, Y Minamino

THERMEC'2003, PTS 1-5　Vol. 426-4　p. 2667-2672　2003/12/31　Research paper (scientific journal)

Mechanical Properties as a function of Grain size in Ultrafine Grained Aluminum and Iron Fabricated by ARB and Annealing Process

Masahide Sato, Nobuhiro Tsuji, Yoritoshi Minamino, Yuichiro Koizumi

Materials Science Forum　Vol. 426-432　No. 3　p. 2753-2758　2003/12/31　Research paper (scientific journal)

Fabrication of ultrarine grained metallic materials by accumulative roll-bonding

N Tsuji, Y Minamino, Y Koizumi, Y Saito

PROCESSING AND FABRICATION OF ADVANCED MATERIALS XI　p. 320-334　2003/12/31　Research paper (international conference proceedings)

Densification and structural evolution in spark plasma sintering process of mechanically alloyed nanocrystalline Fe-23Al-6C powder

Y Koizumi, T Tanaka, Y Minamino, N Tsuji, K Mizuuchi, Y Ohkanda

MATERIALS TRANSACTIONS　Vol. 44　No. 8　p. 1604-1612　2003/08/01　Research paper (scientific journal)

High damping capacity of ultra-fine grained aluminum produced by accumulative roll bonding

Y Koizumi, M Ueyama, N Tsuji, Y Minamino, K Ota

JOURNAL OF ALLOYS AND COMPOUNDS　Vol. 355　No. 1月2日　p. 47-51　2003/06/01　Research paper (scientific journal)

Microstructural change of ultrafine-grained aluminum during high-speed plastic deformation

N Tsuji, T Toyoda, Y Minamino, Y Koizumi, T Yamane, M Komatsu, M Kiritani

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 350　No. 1月2日　p. 108-116　2003/06/01　Research paper (scientific journal)

Interdiffusion in Co solid solutions of Co-Al-Cr-Ni system at 1423 K

Y Minamino, Y Koizumi, N Tsuji, T Yamada, T Takahashi

MATERIALS TRANSACTIONS　Vol. 44　No. 1　p. 63-71　2003/01/01　Research paper (scientific journal)

Effect of Al concentration on growth of antiphase domains in Ti3Al

Y Koizumi, H Katsumura, Y Minamino, N Tsuji

NANOPATTERNING-FROM ULTRALARGE-SCALE INTERGRATION TO BIOTECHNOLOGY　Vol. 705　p. 217-222　2002/12/31　Research paper (international conference proceedings)

Diffusion of Titanium in B2-Type Ordered NiAl Compound

Yoritoshi Minamino, Yuichiro Koizumi, Nobuhiro Tsuji, Shinichiro Yokoyama

Journal of High Temperature Society　Vol. 28　p. 323-328　2002/12/31　Research paper (scientific journal)

Effect of Antiphase Domain Boundaries on Dislocation Motion in Ti3Al Single Crystals Deforming by Prism Slip

Yuichiro Koizumi, Nobuhiro Tsuji, Yoritoshi Minamino, Takayoshi Nakano, Yukichi Umakoshi

Materials Research Society Symposium Proceedings　Vol. 753　p. 267-272　2002/12/31　Research paper (international conference proceedings)

Mechanical properties of ultrafine grained aluminum and ultra low carbon steel produced by ARB process

N Tsuji, Y Ito, Y Koizumi, Y Minamino, Y Saito

ULTRAFINE GRAINED MATERIALS II　p. 389-397　2002/12/31　Research paper (international conference proceedings)

Mechanical properties of nano-structured plain low-carbon steels produced by conventional cold-rolling and annealing of martensite starting microstructure

R Ueji, N Tsuji, Y Minamino, Y Koizumi, Y Saito

ULTRAFINE GRAINED MATERIALS II　p. 399-408　2002/12/31　Research paper (international conference proceedings)

Ultragrain refinement of plain low carbon steel by cold-rolling and annealing of martensite

R Ueji, N Tsuji, Y Minamino, Y Koizumi

ACTA MATERIALIA　Vol. 50　No. 16　p. 4177-4189　2002/09/01　Research paper (scientific journal)

Ti3Al単結晶の疲労変形微細組織、電子顕微鏡法の実践と応用

中野貴由, 小泉雄一郎, 馬越佑吉

2002/06/01

Co diffusion in a B2-type ordered NiAl compound

Y Minamino, Y Koizumi, N Tsuji, T Yamada

JOURNAL OF THE JAPAN INSTITUTE OF METALS　Vol. 66　No. 2　p. 67-74　2002/02/01　Research paper (scientific journal)

Impact and static consolidation of mechanically-alloyed mixture of copper and graphite powders

T Yamane, H Okubo, N Oki, K Hisayuki, M Konishi, Y Minamino, Y Koizumi, M Kiritani, M Komatsu, SJ Kim

RADIATION EFFECTS AND DEFECTS IN SOLIDS　Vol. 157　No. 1月2日　p. 223-231　2002/01/01　Research paper (scientific journal)

Impact and Static Consolidations of Mixture of Copper and Carbon Powders Mechanically Alloyed

山根 壽己, 大久保 寛隆, 沖 信博, 久幸 晃二, 南埜 宜俊, 小泉 雄一郎, 辻 伸泰, 鄭 承富

Journal of the JCBRA　Vol. 40　p. 28-35　2001/12/31　Research paper (scientific journal)

Coalescence behavior of the antiphase domain in Ti3Al

Y Koizumi, Y Minamino, T Nakano, Y Umakoshi

DIFFUSIONS IN MATERIALS: DIMAT2000, PTS 1 & 2　Vol. 194-1　p. 577-582　2001/12/31　Research paper (scientific journal)

In diffusion in B2-type ordered NiAl intermetallic compound

Y Minamino, Y Koizumi, Y Inui

DIFFUSIONS IN MATERIALS: DIMAT2000, PTS 1 & 2　Vol. 194-1　p. 517-522　2001/12/31　Research paper (scientific journal)

Impact consolidation of mixed copper and carbon powders mechanically alloyed

T. Yamane, H. Okubo, N. Oki, K. Hisayuki, M. Konishi, Y. Minamino, Y. Koizumi, M. Kiritani, M. Komatsu, Sung Jin Kim

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　Vol. 48　No. 1　p. 9-14　2001/12/31　Research paper (scientific journal)

A Novel Process to Obtain Nanostructured Low-Carbon Bulky Steel with High Strength

Nobuhiro Tsuji, Rintaro Ueji, Yoshihiro Saito, Yuichiro Koizumi, Yoritoshi Minamino

Proceedings of the 22nd RISO International Symposium on Materials Science, RISO National Laboratory, Denmark,　p. 407-415　2001/12/31　Research paper (international conference proceedings)

Mechanical Properties of Ultrafine Grained Ferritic Steels Produced by Accumulative Roll-Bonding (ARB) Process

Nobuhiro Tsuji, Yoshiki Ito, Rintaro Ueji, Yoritoshi Minamino, Yuichiro Koizumi, Yoshihiro Saito

Proceedings of International Symposium on Ultrafine Grained Steels (ISUGS-2001), ISIJ,　p. 256-259　2001/12/31　Research paper (international conference proceedings)

Microstructure of Cu alloys Annealed and Consolidated at High Pressures

Yoritoshi Minamino, Yuichiro Koizumi, Naoko Hirohata

Proceeding of the 6th Copper and Copper research Conference, 10th May,　p. 1-12　2001/12/31　Research paper (international conference proceedings)

Solid solubility of carbon in a mechanically alloyed Cu-29.7 at. pct Zn alloy

T Yamane, H Okubo, K Hisayuki, N Oki, M Konishi, Y Minamino, Y Koizumi, M Kiritani, M Komatsu, SJ Kim

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　Vol. 32　No. 7　p. 1861-1862　2001/07/01　Research paper (scientific journal)

Solid solubility of carbon in copper mechanically alloyed

T Yamane, H Okubo, K Hisayuki, N Oki, M Konishi, M Komatsu, Y Minamino, Y Koizumi, M Kiritani, SJ Kim

JOURNAL OF MATERIALS SCIENCE LETTERS　Vol. 20　No. 3　p. 259-260　2001/02/01　Research paper (scientific journal)

Pt diffusion in B2-type ordered NiAl intermetallic compound and its diffusion mechanisms

Y. Minamino, Y. Koizumi, N. Tsuji, M. Morioka, K. Hirao, Y. Shirai

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS　Vol. 1　No. 4　p. 237-249　2000/12/31　Research paper (scientific journal)

Quaternary diffusion in 7000 aluminum alloys

Tomoshi Takahashi, Kazuko Hirayama, Yoritoshi Minamino, Toshimi Yamane, Yuuichiro Koizumi

Keikinzoku/Journal of Japan Institute of Light Metals　Vol. 50　No. 10　p. 499-504　2000/12/31　Research paper (scientific journal)

Dislocation dipoles in cyclically deformed Ti3Al single crystals

Y Koizumi, T Nakano, Y Umakoshi

INTERMETALLICS　Vol. 8　No. 2　p. 179-186　2000/02/01　Research paper (scientific journal)

Plastic deformation and fracture behaviour of Ti3Al single crystals deformed at high temperatures under cyclic loading

Y Koizumi, T Nakano, Y Umakoshi

ACTA MATERIALIA　Vol. 47　No. 7　p. 2019-2029　1999/05/01　Research paper (scientific journal)

Formation and stability of saturated bundled structure (SBS) in Ti3Al single crystals cyclically deformed by double prism slip

Y Koizumi, T Nakano, Y Umakoshi

ACTA MATERIALIA　Vol. 46　No. 13　p. 4743-4754　1998/08/01　Research paper (scientific journal)

Plastic deformation behaviour and dislocation structure in Ti3Al single crystals cyclically deforming by prism slip

T Nakano, B Ogawa, Y Koizumi, Y Umakoshi

ACTA MATERIALIA　Vol. 46　No. 12　p. 4311-4324　1998/07/01　Research paper (scientific journal)

Fatigue Behaviour and Deformation Substructure in Ti3Al Single Crystals

Yuichiro Koizumi, Takayoshi Nakano, Bunji Ogawa, Yukichi Umakoshi

Proceedings of Osaka University -University of Nottingham Joint Symposium (Osaka, 1997)　p. 148-154　1997/12/31　Research paper (international conference proceedings)

Fatigue behavior and deformation substructure of Ti3Al single crystals deformed at high temperatures

Y Umakoshi, K Koizumi, T Nakano

THERMEC '97 - INTERNATIONAL CONFERENCE ON THERMOMECHANICAL PROCESSING OF STEELS AND OTHER MATERIALS, VOLS I-II　p. 1433-1439　1997/12/31　Research paper (international conference proceedings)

Effect of order-disorder transition on plastic anomaly of Ti3Al single crystals deforming by prism slip

T Nakano, Y Koizumi, T Tsujimoto, Y Umakoshi

INTERMETALLICS　Vol. 4　No. 7　p. 571-579　1996/12/31　Research paper (scientific journal)

Cyclic deformation and fracture of Ti3Al single crystals

Y Umakoshi, T Nakano, B Ogawa, Y Koizumi

DEFORMATION AND FRACTURE OF ORDERED INTERMETALLIC MATERIALS III　p. 17-25　1996/12/31　Research paper (international conference proceedings)

Anomalous Strengthening for Prism Slip in Stoichiometric Ti3Al Single Crystals with DO19 Structure below Order-Disorder Transition

Takayoshi Nakano, Yuichiro Koizumi, Takashi Tsujimoto, Yukichi Umakoshi

Intermetallics, Vol.4, pp.571-579　1996/04/01　Research paper (scientific journal)