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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 Vol. 267 p. 116812-116812 2025/10 Research paper (scientific journal)
Publisher: Elsevier BV
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Synergistic enhancement of strength, corrosion resistance, and stress corrosion cracking resistance in WE43 Mg alloy via T6 treatment
Xu Wang, Xiaoyang Qian, Yang Li, Jinhui Liu, Yuheng Liu, Masayuki Okugawa, Yuichiro Koizumi, Jinxue Liu, Haitao Xie, Yun Zou
Corrosion Science Vol. 255 p. 113096-113096 2025/10 Research paper (scientific journal)
Publisher: Elsevier BV
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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 Research paper (scientific journal)
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Evidence of underlying structural similarities of amorphous materials
Akihiko Hirata, Kengo Nishio, Masayuki Okugawa, Ryusuke Nakamura
Communications Materials 2025/07/29 Research paper (scientific journal)
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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 Vol. 77 p. 102319-102319 2025/06 Research paper (scientific journal)
Publisher: Elsevier BV
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Ultrahigh strength in Ti-Fe-Sn-Nb alloys through short-range chemical and topological ordering
D.V. Louzguine-Luzgin, M. Okugawa, A.K.A. Lu, Yu.P. Ivanov, A.L. Greer
Journal of Alloys and Compounds 2025/05 Research paper (scientific journal)
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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
Journal of the Japan Society of Powder and Powder Metallurgy Vol. 72 No. Supplement p. S1465-S1469 2025/03/15 Research paper (scientific journal)
Publisher: Japan Society of Powder and Powder Metallurgy
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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 Vol. 102 p. 104737-104737 2025/03 Research paper (scientific journal)
Publisher: Elsevier BV
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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 Research paper (scientific journal)
Publisher: Elsevier BV
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Promoting the ordering of L10-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 p. 116398-116398 2025/01 Research paper (scientific journal)
Publisher: Elsevier BV
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Resolving the Long-Standing Discrepancy in Fe3Al Ordering Mobilities: A Synergistic Experimental and Phase-Field Study
Yuheng Liu, Madoka Watanabe, Masayuki Okugawa, Takashi Hagiwara, Tsubasa Sato, Yusuke Seguchi, Yoshitaka Adachi, Yoritoshi Minamino, Yuichiro Koizumi
Acta Materialia p. 119958-119958 2024/04 Research paper (scientific journal)
Publisher: Elsevier BV
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Solute segregation in a rapidly solidified Hastelloy-X Ni-based superalloy during laser powder bed fusion investigated by phase-field and computational thermal-fluid dynamics simulations
Masayuki Okugawa, Kenji Saito, Haruki Yoshima, Katsuhiko Sawaizumi, Sukeharu Nomoto, Makoto Watanabe, Takayoshi Nakano, Yuichiro Koizumi
Additive Manufacturing 2024/03 Research paper (scientific journal)
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Data assimilation for phase-field simulations of the formation of eutectic alloy microstructures
Yusuke Seguchi, Masayuki Okugawa, Chuanqi Zhu, Akinori Yamanaka, Yuichiro Koziumi
Computational Materials Science 2024/03 Research paper (scientific journal)
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Peculiar microstructural evolution and hardness variation depending on laser powder bed fusion-manufacturing condition in Ti–6Al–2Sn–4Zr–6Mo
Prince Valentine Cobbinah, Sae Matsunaga, Yoshiaki Toda, Ryosuke Ozasa, Masayuki Okugawa, Takuya Ishimoto, Yuheng Liu, Yuichiro Koizumi, Pan Wang, Takayoshi Nakano, Yoko Yamabe-Mitarai
Smart Materials in Manufacturing 2024 Research paper (scientific journal)
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Martensitic Phase-Transforming Metamaterial: Concept and Model
Sosuke Kanegae, Masayuki Okugawa, Yuichiro Koizumi
Materials 2023/10/25 Research paper (scientific journal)
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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 2023/08/03 Research paper (scientific journal)
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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 Research paper (scientific journal)
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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 Research paper (scientific journal)
Publisher: Iron and Steel Institute of Japan
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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 Research paper (scientific journal)
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Raking Process for Powder Bed Fusion of Ti6Al4V Alloy Powder Analyzed by Discrete Element Method+1
Masayuki Okugawa, Yusuke Isono, Yuichiro Koizumi, Takayoshi Nakano
Materials Transactions Vol. 64 No. 1 p. 37-43 2023 Research paper (scientific journal)
Publisher: Japan Institute of Metals
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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 Research paper (scientific journal)
Publisher: Elsevier {BV}
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Thermally induced phase transforming cellular lattice driven by bimetal beams
Hayato Nagayama, Sosuke Kanegae, Masaki Hosoda, Masayuki Okugawa, Yuichiro Koizumi
MRS Advances Vol. 7 No. 30 p. 701-705 2022/09/08 Research paper (scientific journal)
Publisher: Springer Science and Business Media {LLC}
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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)
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Ultrafine nanoporous intermetallic catalysts by high-temperature liquid metal dealloying for electrochemical hydrogen production
Ruirui Song, Jiuhui Han, Masayuki Okugawa, Rodion Belosludov, Takeshi Wada, Jing Jiang, Daixiu Wei, Akira Kudo, Yuan Tian, Mingwei Chen, Hidemi Kato
Nature Communications Vol. 13 No. 1 2022/09/02 Research paper (scientific journal)
Publisher: Springer Science and Business Media LLC
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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)
Publisher: Japan Institute of Light Metals
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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)
Publisher: Iron and Steel Institute of Japan
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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 p. 856-856 2021/07/23 Research paper (scientific journal)
Publisher: {MDPI} {AG}
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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 p. 208-213 2021 Research paper (scientific journal)
Publisher: Sumart Processing Society for Minerals, Environment and Energy
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Prediction of Solute Element Segregation in Additive Manufactured Ni-based Superalloy using Multi-phase Field Simulation
奥川将行, 齊藤賢士, 若林誠, 小泉雄一郎
スマートプロセス学会誌 Vol. 10 No. 4 2021
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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 2020/11/01 Research paper (scientific journal)
Publisher: Japan Institute of Metals
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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)
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Dual crystallization modes of sputter-deposited amorphous SiGe films
M. Okugawa, R. Nakamura, H. Numakura, M. Ishimaru, H. Yasuda
Journal of Applied Physics Vol. 128 No. 1 p. 015303-015303 2020/07/07 Research paper (scientific journal)
Publisher: AIP Publishing
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Effects of hydrogen on structure and crystallization behavior of sputter-deposited amorphous germanium films
Yuki Hanya, Ryusuke Nakamura, Masayuki Okugawa, Manabu Ishimaru, Goro Oohata, Hidehiro Yasuda
Japanese Journal of Applied Physics Vol. 59 No. 7 p. 075506-075506 2020/07/01 Research paper (scientific journal)
Publisher: IOP Publishing
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Direct observations of crystallization processes of amorphous GeSn during thermal annealing: A temperature window for suppressing Sn segregation
Masashi Higashiyama, Manabu Ishimaru, Masayuki Okugawa, Ryusuke Nakamura
Journal of Applied Physics Vol. 125 No. 17 p. 175703-175703 2019/05/07 Research paper (scientific journal)
Publisher: AIP Publishing
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The relation between amorphous structure and explosive crystallization of sputter-deposited amorphous germanium thin films
Masayuki Okugawa, Ryusuke Nakamura, Hiroshi Numakura, Akira Heya, Naoto Matsuo, Hidehiro Yasuda
Japanese Journal of Applied Physics Vol. 58 No. 4 p. 045501-045501 2019/04/01 Research paper (scientific journal)
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Synthesis of high Sn concentration GeSn by recrystallization of amorphous phase
Masashi Higashiyama, Manabu Ishimaru, Masayuki Okugawa, Ryusuke Nakamura
Proceedings of Materials Science and Technology 2018 p. 284-287 2019/02 Research paper (international conference proceedings)
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Structure of crystallized particles in sputterdeposited amorphous germanium films
Okugawa, M., Nakamura, R., Hirata, A., Ishimaru, M., Yasuda, H., Numakura, H.
Journal of Applied Crystallography Vol. 51 No. 5 p. 1467-1473 2018/10/01 Research paper (scientific journal)
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Low-temperature synthesis of crystalline GeSn with high Sn concentration by electron excitation effect
Kimura Toshiki, Ishimaru Manabu, Okugawa Masayuki, Nakamura Ryusuke, Yasuda Hidehiro
JAPANESE JOURNAL OF APPLIED PHYSICS Vol. 56 No. 10 2017/10 Research paper (scientific journal)
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Inhomogeneous Crystallization of Sputter-Deposited Amorphous Ge Films
2017 24TH INTERNATIONAL WORKSHOP ON ACTIVE-MATRIX FLATPANEL DISPLAYS AND DEVICES (AM-FPD) p. 276-278 2017/08 Research paper (international conference proceedings)
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Crystallization Processes of Amorphous GeSn Thin Films by Heat Treatment and Electron Beam Irradiation
Kimura T, Ishimaru M, Okugawa M, Nakamura R, Yasuda H
Microscopy and Microanalysis Vol. 23 No. S1 p. 2046-2047 2017/07 Research paper (international conference proceedings)
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Thermal crystallization of sputter-deposited amorphous Ge films: Competition of diamond cubic and hexagonal phases
M. Okugawa, R. Nakamura, M. Ishimaru, H. Yasuda, H. Numakura
AIP Advances Vol. 6 No. 12 p. 125035-125035 2016/12 Research paper (scientific journal)
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Crystallization of sputter-deposited amorphous Ge films by electron irradiation: Effect of low-flux pre-irradiation
M. Okugawa, R. Nakamura, M. Ishimaru, H. Yasuda, H. Numakura
Journal of Applied Physics Vol. 120 No. 13 p. 134308-134308 2016/10 Research paper (scientific journal)
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Structural transition in sputter-deposited amorphous germanium films by aging at ambient temperature
M. Okugawa, R. Nakamura, M. Ishimaru, K. Watanabe, H. Yasuda, H. Numakura
Journal of Applied Physics Vol. 119 No. 21 p. 214309-214309 2016/06 Research paper (scientific journal)
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Discussion of "On the Boltzmann-Matano Analysis of Diffusion in a Semi-infinite Medium"
Masayuki Okugawa, Hiroshi Numakura
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE Vol. 46 No. 9 p. 3813-3814 2015/07 Research paper (scientific journal)
