顔写真

PHOTO

Yamamoto Hajime
山本 啓
Yamamoto Hajime
山本 啓
Joining and Welding Research Institute,Assistant Professor
yamamoto.hajime.jwri osaka-u.ac.jp

keyword Additive manufacturing,Composite,Surface modification,Surfaces and interfaces,Solid state joining,Dissimilar welding,Steel,Wear,Friction stir processing,Friction stir welding

Research History 1

  1. 2019/02 - Present
    Osaka University Joining and Welding Research Institute Assistant Professor

Education 2

  1. Osaka University Graduate School of Engineering Division of Materials and Manufacturing Science

    2014/04 - 2019/02

  2. Kansai University Faculty of Chemistry, Materials and Bioengineering Department of Chemistry and Materials Engineering

    2010/04 - 2014/03

Committee Memberships 5

  1. 一般社団法人 溶接学会 全国大会運営委員会 委員

    2024/04 - Present

  2. 一般社団法人 溶接学会 若手会員の会運営委員会 副委員長

    2024/04 - Present

  3. 一般社団法人 日本鉄鋼協会 創形創質工学部会 接合・結合フォーラム 委員 Academic society

    2023/01 - Present

  4. 一般社団法人 溶接学会 編集委員会 委員 Academic society

    2020/04 - 2024/03

  5. 一般社団法人 溶接学会 若手会員の会運営委員会 委員 Academic society

    2019/04 - 2024/03

Professional Memberships 4

  1. The Iron and Steel Institute of Japan

  2. Smart Processing Society for Materials, Environment & Energy

  3. The Japan Institute of Metals and Materials

  4. Japan Welding Society

Research Areas 4

  1. Nanotechnology/Materials / Composite materials and interfaces /

  2. Nanotechnology/Materials / Structural and functional materials /

  3. Nanotechnology/Materials / Material fabrication and microstructure control /

  4. Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Manufacturing and production engineering /

Awards 9

  1. 優秀論文賞

    山本 啓 (公財) マザック財団 2025/05/15

  2. 接合科学共同利用・共同研究賞

    外本 和幸, 田中 茂, 伊藤 和博, 山本 啓, 高橋 誠 国立大学法人 大阪大学 接合科学研究所 2021/09

  3. 溶接学会論文奨励賞

    山本 啓 一般社団法人 溶接学会 2021/04

  4. 2020年度溶接学会全国大会優秀研究発表賞

    山本 啓 一般社団法人 溶接学会 2020/12

  5. 論文賞

    山本 啓, 和泉 博貴, 伊藤 和博 一般社団法人 スマートプロセス学会 2020/11

  6. Excellent Presentation Award

    Hajime Yamamoto, Yoshikazu Danno, Kazuhiro Ito, Yoshiki Mikami, Hidetoshi Fujii International Symposium on Creation of Life Innovation Materials for Interdiscriplinary and International Researcher Development Satellite (iLIM-s) 2019/11

  7. 平成30年度 界面接合研究賞

    山本 啓, 段野 芳和, 今川 雄大, 伊藤 和博 一般社団法人 溶接学会 界面接合研究委員会 2019/05

  8. 海外論文発表奨励賞

    山本 啓 一般社団法人 生産技術振興会 2018/10

  9. 平成28年度 溶接冶金研究委員会 優秀研究賞

    山本 啓 一般社団法人 溶接学会 溶接冶金研究委員会 2017/05

Papers 39

  1. Compressive residual stress applied to a low-carbon steel surface alloyed with WC tool constituent elements according to friction stir processing

    Hajime Yamamoto, Yuji Yamamoto, Kazuhiro Ito, Yoshiki Mikami

    Materials & Design Vol. 244 2024/08/02 Research paper (scientific journal)

    Publisher: Elsevier BV
  2. Strengthening of Al/Cu dissimilar joint due to complicated interface produced by pulsed TIG welding with a constricted nozzle

    Hajime Yamamoto, Yusuke Yanagi, Kazuhiro Ito, Hisaya Komen, Manabu Tanaka, Akihisa Murata

    Welding International Vol. 37 No. 12 p. 718-729 2023/07/27 Research paper (scientific journal)

    Publisher: Informa UK Limited
  3. Adapted to generate compressive residual stress and retained austenite in a steel surface layer by friction stir processing with the WC tool

    Hajime Yamamoto, Yuji Yamamoto, Kazuhiro Ito, Yoshiki Mikami

    Proceedings of The 76th IIW Annual Assembly 2023/07/16 Research paper (international conference proceedings)

  4. Strengthening of Al/Cu dissimilar joint due to complicated interface produced by pulsed TIG welding with a constricted nozzle

    Hajime Yamamoto, Yusuke Yanagi, Kazuhiro Ito, Hisaya Komen, Manabu Tanaka, Akihisa Murata

    Quarterly Journal of the Japan Welding Society Vol. 41 No. 1 p. 168-177 2023/04/12 Research paper (scientific journal)

    Publisher: Japan Welding Society
  5. Orientation dependence of plastic deformation of sintered Nd-Fe-B magnets at high temperature

    Mei Liu, Lanting Zhang, Bingbing Zhao, Fugang Chen, Xianshuang Xia, Yongjiang Yu, Hajime Yamamoto, Kazuhiro Ito

    Acta Materialia Vol. 244 2022/11/26 Research paper (scientific journal)

  6. Toughening due to deformation induced martensitic transformation in delta ferrite-containing austenitic stainless steel weld metals

    Hajime Yamamoto, Reika Oda, Kazuhiro Ito, Hirofumi Maniwa, Yoshihiko Kitagawa, Hirohisa Watanabe

    Proceedings of The 75th IIW Assembly 2022/07/17 Research paper (international conference proceedings)

  7. Experimental study on improving the additively manufactured GMAW and TIG beads using FSP

    Murshid Imam, Sai Naga Sri Harsha Chittajallu, Himanshu Gururani, Hajime Yamamoto, Kazuhiro Ito, Pradeep Kumar Parchuri, Rajnish Mishra, Abhay Sharma, Ashutosh Richhariya, Viswanath Chinthapenta

    Materials Today: Proceedings Vol. 56 p. 690-705 2022/01/22 Research paper (scientific journal)

    Publisher: Elsevier BV
  8. Fatigue strength improvement due to alloying steel weld toes with WC tool constituent elements through friction stir processing

    Hajime Yamamoto, Shodai Koga, Kazuhiro Ito, Yoshiki Mikami

    The International Journal of Advanced Manufacturing Technology Vol. 119 p. 6203-6213 2022/01/19 Research paper (scientific journal)

  9. Microstructure features and formation mechanism in a newly developed electroslag welding

    Tomonori Kakizaki, Shodai Koga, Hajime Yamamoto, Yoshiki Mikami, Kazuhiro Ito, Kei Yamazaki, Shuji Sasakura, Hirohisa Watanabe

    Welding in the World Vol. 66 No. 2 p. 313-324 2021/11/27 Research paper (scientific journal)

    Publisher: Springer Science and Business Media LLC
  10. Alloying a topmost steel-plate layer with WC-tool constituent elements during friction stir processing

    Hajime Yamamoto, Yudai Imagawa, Kazuhiro Ito, Ke Chen, Lanting Zhang

    Journal of Manufacturing Processes Vol. 69 p. 311-319 2021/08/12 Research paper (scientific journal)

  11. Microstructure evolution along build direction for thin-wall components fabricated with wire-direct energy deposition

    Janmejay Dattatraya Kulkarni, Suresh Babu Goka, Pradeep Kumar Parchuri, Hajime Yamamoto, Kazuhiro Ito, Suryakumar Simhambhatla

    Rapid Prototyping Journal Vol. 27 No. 7 p. 1289-1301 2021/07/12 Research paper (scientific journal)

  12. Feature of microstructure and its formation mechanism in a newly developed electro slag welding

    Tomonori Kakizaki, Shodai Koga, Hajime Yamamoto, Yoshiki Mikami, Kazuhiro Ito, Kei Yamazaki, Shuji Sasakura, Hirohisa Watanabe

    Proceedings of The 74th IIW on-line Assembly 2021/07/07 Research paper (international conference proceedings)

  13. Investigation of WC-tool-component solution mechanism arose in a steel surface layer during friction stir processing

    Hajime Yamamoto, Yudai Imagawa, Kazuhiro Ito

    Proceedings of The 74th IIW on-line Assembly 2021/07/07 Research paper (international conference proceedings)

  14. Characterization of shock wave damages in explosion welded Mo/Cu clads

    Pradeep Kumar Parchuri, Shota Kotegawa, Kazuhiro Ito, Hajime Yamamoto, Akihisa Mori, Shigeru Tanaka, Kazuyuki Hokamoto

    Metals Vol. 11 No. 3 2021/03/18 Research paper (scientific journal)

  15. Friction stir welding of ultrahigh-purity aluminum thin sheets never to lower high conductivity at ultra-low temperature

    Hajime Yamamoto, Yusuke Aoyama, Kazuhiro Ito, Tetsuo Yamada, Manabu Tanaka, Hiroaki Hoshikawa, Akira Nagata, Toshiaki Kumagai

    Quarterly Journal of the Japan Welding Society Vol. 38 No. 4 p. 253-262 2020/12/25 Research paper (scientific journal)

  16. Surface microstructure modifications of low carbon steel welds produced by low-heat-input friction stir processing

    Hajime Yamamoto, Tomohiro Nishiura, Hitomi Nishibata, Mitsuharu Yonemura, Kazuki Fujiwara, Kaori Kawano, Kazuhiro Ito

    Materials Transactions Vol. 61 No. 8 p. 1613-1619 2020/07/25 Research paper (scientific journal)

  17. Metallurgical characterization of penetration shape change in workpiece vibration-assisted tandem-pulsed gas metal arc welding

    Habib Hamed Zargari, Kazuhiro Ito, Tsuyoshi Miwa, Pradeep Kumar Parchuri, Hajime Yamamoto, Abhay Sharma

    Materials Vol. 13 No. 14 2020/07/10 Research paper (scientific journal)

  18. Friction stir welding of ultra high-purity aluminium thin sheets never to lower high conductivity at ultra-low temperature

    Hajime Yamamoto, Yusuke Aoyama, Kazuhiro Ito, Tetsuo Yamada, Manabu Tanaka, Hiroaki Hoshikawa, Akira Nagata, Toshiaki Kumagai

    Welding International Vol. 34 No. 4-6 p. 125-137 2020/05/07 Research paper (scientific journal)

    Publisher: Informa UK Limited
  19. TEM characterization of explosive cladding interfaces between refractory metal (group V or VI) and Cu plates

    Pradeep K Parchuri, Makoto Takahashi, Kazuhiro Ito, Hajime Yamamoto, Kazuyuki Hokamoto

    Journal of Smart Processing Vol. 8 No. 6 p. 261-266 2019/12/14 Research paper (scientific journal)

    Publisher: Sumart Processing Society for Minerals, Environment and Energy
  20. Cladding of a crack-free W plate on Cu plates using explosive welding at higher collision velocity with lower collision angle

    Pradeep K. Parchuri, Shota Kotegawa, Kazuhiro Ito, Hajime Yamamoto, Akihisa Mori, Shigeru Tanaka, Kazuyuki Hokamoto

    Results in Materials Vol. 5 2019/09/10 Research paper (scientific journal)

  21. Effect of workpiece-vibration on penetration shape change of P-GMA welds

    Kazuhiro Ito, Habib Hamed Zargari, Hajime Yamamoto, Tsuyoshi Miwa, Pradeep Kumar Parchuri, Manish Kumar, Abhay Sharma

    Proceedings of The 72nd IIW Annual Assembly 2019/07/07 Research paper (international conference proceedings)

  22. Effects of microstructural modification by friction stir processing on fracture toughness of low-carbon steel welds

    Hajime Yamamoto, Hiroki Izumi, Kazuhiro Ito

    Journal of Smart Processing Vol. 8 No. 1 p. 29-35 2019/04/02 Research paper (scientific journal)

    Publisher: Sumart Processing Society for Minerals, Environment and Energy
  23. Benefits of intermediate-layer formation at the interface of Nb/Cu and Ta/Cu explosive clads

    Pradeep K. Parchuri, Shota Kotegawa, Hajime Yamamoto, Kazuhiro Ito, Akihisa Mori, Kazuyuki Hokamoto

    Materials & Design Vol. 166 No. 15 2019/01/22 Research paper (scientific journal)

  24. Application of friction stir processing to weld toe for fatigue strength improvement of high-strength low-alloy steel joint

    Hajime Yamamoto, Yoshikazu Danno, Kazuhiro Ito, Yoshiki Mikami, Kazuyuki Kohama, Hidetoshi Fujii

    Welding Letters Vol. 36 No. 4 p. 1WL-4WL 2018/12/08 Research paper (scientific journal)

  25. Advantages of intermediate-layer formation at the interface of Nb/Cu and Ta/Cu explosive clads over a wavy interface

    Pradeep Kumar Parchuri, Shota Kotegawa, Hajime Yamamoto, Kazuhiro Ito, Akihisa Mori, Kazuyuki Hokamoto

    Proceedings of 4th International Conference “Welding and Failure Analysis of Engineering Materials” (WAFA-2018) 2018/11/19 Research paper (international conference proceedings)

  26. Weld toe modification by friction stir processing using a spherical tip tool in high-strength low-alloy steel joints

    Hajime Yamamoto, Yoshikazu Danno, Kazuhiro Ito, Hidetoshi Fujii

    Proceedings of 4th International Conference “Welding and Failure Analysis of Engineering Materials” (WAFA-2018) 2018/11/19 Research paper (international conference proceedings)

  27. Weld toe modification using spherical-tip WC tool FSP in fatigue strength improvement of high-strength low-alloy steel joints

    Hajime Yamamoto, Yoshikazu Danno, Kazuhiro Ito, Yoshiki Mikami, Hidetoshi Fujii

    Materials & Design Vol. 160 No. 15 p. 1019-1028 2018/10/28 Research paper (scientific journal)

  28. Effects of heat-affected-zone microstructure and molten-zinc temperature on zinc embrittlement cracking induced by excess tensile stress in low-alloy steels possessing resistance to LME

    Hiroshi Muto, Yoshikazu Danno, Hajime Yamatomo, Kazuhiro Ito

    Quarterly Journal of the Japan Welding Society Vol. 36 No. 4 p. 230-237 2018/10/11 Research paper (scientific journal)

  29. Effects of microstructural modification using friction stir processing on fatigue strength of butt-welded joints for high-strength steels

    Hajime Yamamoto, Kazuhiro Ito

    Materials Sciences and Applications Vol. 9 No. 7 p. 625-636 2018/06/28 Research paper (scientific journal)

    Publisher: Scientific Research Publishing, Inc.
  30. Application of friction stir processing to high-tensile-steel welds

    Kazuhiro Ito, Hajime Yamamoto, Tatsuya Okuda, Hiroki Izumi, Makoto Takahashi, Kazuyuki, Kohama, Hidetoshi Fujii

    Proceeding of The Conference of International Welding and Inspection Technology 2017 and the Conference of Thailand Welding and Inspection Technology 2017 (IWIT & TWIT 2017) p. 12-18 2017/11/11 Research paper (international conference proceedings)

  31. Application of friction stir processing to high-tensile-steel welds

    Kazuhiro Ito, Hajime Yamamoto, Makoto Takahashi, Kazuyuki, Kohama, Hidetoshi Fujii

    Proceeding of 7th International Conference on Welding Science and Engineering in conjunction with 3rd International Symposium on Computer-Aided Welding Engineering (WSE & CAWE 2017) p. 263-266 2017/10/18 Research paper (international conference proceedings)

  32. Study on the microstructure and liquid phase formation in a semisolid gray cast iron

    Davi Munhoz Benati, Kazuhiro Ito, Kazuyuki Kohama, Hajime Yamamoto, Eugenio José Zoqui

    Metallurgical and Materials Transactions B Vol. 48 No. 5 p. 2293-2303 2017/06/22 Research paper (scientific journal)

  33. Spherical porous granules in MgO–Fe2O3–Nb2O5 system: In situ observation of formation behavior using high-temperature confocal laser-scanning microscopy

    Yoshikazu Suzuki, Hiroya Abe, Hajime Yamamoto, Kazuhiro Ito, Hiroshige Inoue, Mayumi Nakamura

    Journal of the European Ceramic Society Vol. 37 No. 16 p. 5339-5345 2017/06/07 Research paper (scientific journal)

  34. Increase in fatigue strength of butt-welded high-tensile steel joints by friction stir processing

    Hajime Yamamoto, Kazuhiro Ito, Makoto Takahashi, Kazuyuki Kohama, Hidetoshi Fujii

    Proceedings of 10th International Conference on Trends in Welding Research p. 875-878 2016/10/11 Research paper (international conference proceedings)

  35. Increase in fatigue strength and Charpy absorbed energies of TIG-welded SS400 steel plates by friction-stir-processing grain-refinement

    Kazuhiro Ito, Tatsuya Okuda, Hiroki Izumi, Makoto Takahashi, Hajime Yamamoto, Hidetoshi Fujii

    Proceedings of 10th International Conference on Trends in Welding Research p. 866-869 2016/10 Research paper (international conference proceedings)

  36. In situ observation of semisolid Fe-2.5C-1.5Si gray cast iron

    Davi Munhoz Benati, Kazuhiro Ito, Kazuyuki Kohama, Hajime Yamamoto, Eugenio José Zoqui

    Solid State Phenomena Vol. 256 p. 63-68 2016/09/30 Research paper (scientific journal)

  37. Effects of friction-stir-processing grain-refinement on fatigue strength and Charpy absorbed energies of TIG-welded SS400 steel plates

    Kazuhiro Ito, Tatsuya Okuda, Hiroki Izumi, Makoto Takahashi, Hajime Yamamoto, Hidetoshi Fujii

    Proceedings of The 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM9) p. 218-222 2016/08/01 Research paper (international conference proceedings)

  38. Increase of fatigue strength of high-tensile steel welds with increase of yield stress using friction stir processing

    Ryota Yamasaki, Kazuhiro Ito, Kazuyuki Kohama, Makoto Takahashi, Hajime Yamamoto, Hidetoshi Fujii, Rintaro Ueji, Chiaki Shiga

    Proceedings of 3rd International Conference in Africa and Asia “Welding and Failure Analysis of Engineering Materials” (WAFA-2015) 2015/11/02 Research paper (international conference proceedings)

  39. Investigation of fracture location of T22/T91 dissimilar welds

    Salita Petchsang, Isaratat Phung-on, Hidenori Terasaki, Yu-Ichi Komizo, Hajime Yamamoto

    Key Engineering Materials Vol. 659 p. 355-360 2015/08/18 Research paper (scientific journal)

Misc. 10

  1. 引張残留応力を低減あるいは圧縮残留応力に変える表面改質の事例

    伊藤 和博, 山本 啓, 山元 優士, 渡邊 大翔, 田中 努, A.S. Vishunu, Suryakumar S.

    溶接学会第129回界面接合研究委員会, 大阪大学医工東京ブランチ 2025/06/06 Research paper, summary (national, other academic conference)

  2. Report of WELNET evening forum at JWS national meeting in Spring 2024 & Report of the 70th meeting of WELNET steering committee

    Tomoya Asayama, Tsuyoshi Miwa, Tomoki Matsuda, Hajime Yamamoto, Issei Uchino

    Journal of the Japan Welding Society Vol. 93 No. 6 p. 405-406 2024/09 Meeting report

    Publisher: Japan Welding Society
  3. Formation of hook-shaped interface in Al/Cu dissimilar thin sheet joint by pulsed TIG welding with a constricted nozzle

    Hajime Yamamoto

    Journal of Light Metal Welding Vol. 61 No. 10 p. 15-21 2023/10 Article, review, commentary, editorial, etc. (scientific journal)

  4. Interview

    Hajime Yamamoto

    Journal of Light Metal Welding Vol. 61 No. 6 p. 56-57 2023/06 Other

  5. 超高純度アルミニウムのクリーン接合

    山本 啓

    WE-COMマガジン Vol. 46 p. 1-8 2022/10 Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)

  6. A preface young and energetic professionals –Digital transformation (DX) of welding industries–

    Hajime Yamamoto, Kazuki Kasano, Keigo Tnaka

    Journal of the Japan Welding Society Vol. 91 No. 6 p. 436-436 2022/09/05 Book review, literature introduction, etc.

    Publisher: Japan Welding Society
  7. 摩擦攪拌ツールの摩耗研究から新規表面合金化技術の確立を目指す

    山本 啓

    Sheetmetal ましん&そふと Vol. 90 p. 36-37 2021/11 Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)

  8. Passion of young professionals for welding and joining research -A preface

    Kazuki Kasano, Hajime Yamamoto

    Journal of the Japan Welding Society Vol. 90 No. 4 p. 256-256 2021/06/14 Book review, literature introduction, etc.

    Publisher: Japan Welding Society
  9. WAFA-2018での海外論文発表

    山本 啓

    生産と技術 Vol. 71 p. 102-102 2019/04 Meeting report

  10. Egg of Welding

    Hajime Yamamoto

    Journal of the Japan Welding Society Vol. 87 No. 7 p. 523-525 2018/11/08 Other

    Publisher: Japan Welding Society

Presentations 111

  1. 引張残留応力を低減あるいは圧縮残留応力に変える表面改質の事例

    伊藤 和博, 山本 啓, 山元 優士, 渡邊 大翔, 田中 努, A.S. Vishunu, Suryakumar S.

    溶接学会第129回界面接合研究委員会, 大阪大学医工東京ブランチ 2025/06/06

  2. 銅溶接金属中のカーボンナノチューブ分散状態に及ぼすTi添加の影響

    濵名 菜々子, 山本 啓, 高橋 誠, 伊藤 和博

    一般社団法人 溶接学会 2024年度秋季全国大会

  3. 銅溶接金属中へのカーボンナノチューブ添加の検討

    濵名 菜々子, 山本 啓, 伊藤 和博

    一般社団法人 溶接学会 2024年度春季全国大会

  4. 超ハイテン鋼板のアーク溶接継手疲労強度向上に関する研究

    星野 佑介, 伊藤 和博, 山本 啓, Hong Seong Min, 戸田 要, 鈴木 励一

    一般社団法人 溶接学会 2024年度春季全国大会

  5. Alloying of low-carbon steel surface due to friction stir processing with WC tool wear

    Hajime Yamamoto, Yuji Yamamoto, Yudai Imagawa, Kazuhiro Ito, Yoshiki Mikami

    The 3rd Materials Research Meeting (MRM2023) / The 24th IUMRS-International Conference in Asia (IUMRS-ICA2023)

  6. 摩擦攪拌プロセス中の荷重低減とそのWCツール元素固溶量への影響

    山本 啓, 柳 悠輔, 伊藤 和博

    公益社団法人 日本金属学会 2023年秋期(第173回)講演大会

  7. 摩擦攪拌プロセス中の荷重低減とそのWCツール元素固溶量への影響

    柳 悠輔, 山本 啓, 伊藤 和博

    一般社団法人 溶接学会 2023年度秋季全国大会

  8. 加工誘起変態を起こすδフェライト含有γ系溶着金属の横膨出量と吸収エネルギーの関係

    星野 佑介, 小田 怜佳, 伊藤 和博, 山本 啓, Hong Seong Min, 阿部 真弓, 鈴木 正道, 北川 良彦

    一般社団法人 溶接学会 2023年度秋季全国大会

  9. Low-temperature toughness increase for austenitic stainless steel weld metal for cryogenic use

    Hirofumi Maniwa, Mayumi Abe, Masamichi Suzuki, Yoshihiko Kitagawa, Yusuke Hoshino, Reika Oda, Hajime Yamamoto, Seong Min Hong, Kazuhiro Ito

    The 76th IIW Annual Assembly and International Conference on Welding and Joining

  10. Adapted to generate compressive residual stress and retained austenite in a steel surface layer by friction stir processing with the WC tool

    Hajime Yamamoto, Yuji Yamamoto, Kazuhiro Ito, Yoshiki Mikami

    The 76th IIW Annual Assembly and International Conference on Welding and Joining

  11. オーステナイト系ステンレス鋼溶接金属の極低温じん性向上に寄与する因子の検討

    星野 佑介, 小田 怜佳, Hong Seong Min, 山本 啓, 伊藤 和博, 馬庭 啓史, 阿部 真弓, 鈴木 正道, 北川 良彦

    一般社団法人 溶接学会 2023年度春季全国大会

  12. WCツール摩擦攪拌プロセスにより生成された残留γの疲労き裂進展抵抗への寄与

    山本 啓, 山元 優士, 伊藤 和博

    一般社団法人 溶接学会 2023年度春季全国大会

  13. Surface alloying due to WC tool wear during FSP and its effects on the microstructure and mechanical properties of topmost steel layer

    Hajime Yamamoto, Yudai Imagawa, Yuji Yamamoto, Kazuhiro Ito

    TMS 2023 152nd Annual Meeting & Exhibition

  14. WCツール摩擦攪拌プロセス施工面における疲労き裂進展速度に及ぼす残留γの影響

    山本 啓, 山元 優士, 伊藤 和博

    公益社団法人 日本金属学会 2023年春期(第172回)講演大会

  15. Effect of deformation-induced martensitic transformation on low-temperature toughness in delta ferrite-containing austenitic stainless steel weld metals

    Reika Oda, Hajime Yamamoto, Kazuhiro Ito, Hirofumi Maniwa, Yoshihiko Kitagawa, Hirohisa Watanabe

    The 6th International Symposium on Visualization in Joining & Welding Science through Advanced Measurements and Simulation (Visual-JW 2022) & The 2nd International Symposium on Design & Engineering by Joint Inverse Innovation for Materials Architecture (DEJI2MA)

  16. Strengthening of Al/Cu dissimilar joint due to complicated interface produced by pulsed TIG welding with a constricted nozzle

    Yusuke Yanagi, Hajime Yamamoto, Kazuhiro Ito, Hisaya Komen, Manabu Tanaka, Akihisa Murata

    The 6th International Symposium on Visualization in Joining & Welding Science through Advanced Measurements and Simulation (Visual-JW 2022) & The 2nd International Symposium on Design & Engineering by Joint Inverse Innovation for Materials Architecture (DEJI2MA)

  17. Post weld tungsten alloying in a topmost steel layer through friction stir processing using a WC tool

    Kazuhiro Ito, Hajime Yamamoto, Yoshiki Mikami, Makoto Takahashi

    The 6th International Symposium on Visualization in Joining & Welding Science through Advanced Measurements and Simulation (Visual-JW 2022) & The 2nd International Symposium on Design & Engineering by Joint Inverse Innovation for Materials Architecture (DEJI2MA)

  18. Addition of compressive residual stress and retained austenite in steel surface layers by friction stir processing with the WC tool

    Hajime Yamamoto, Yuji Yamamoto, Kazuhiro Ito, Yoshiki Mikami

    The 6th International Symposium on Visualization in Joining & Welding Science through Advanced Measurements and Simulation (Visual-JW 2022) & The 2nd International Symposium on Design & Engineering by Joint Inverse Innovation for Materials Architecture (DEJI2MA)

  19. WCツール摩擦攪拌プロセスにより鋼表層に生じる圧縮残留応力と残留オーステナイト

    山本 啓, 山元 優士, 伊藤 和博, 三上 欣希

    公益社団法人 日本金属学会 2022年秋期(第171回)講演大会

  20. オーステナイト系ステンレス鋼溶接金属の加工誘起マルテンサイト変態による極低温じん性増加に及ぼすMn量の影響

    小田 怜佳, 山本 啓, 伊藤 和博, 馬庭 啓史, 北川 良彦, 渡邉 博久

    一般社団法人 溶接学会 2022年度秋季全国大会

  21. WCツール摩擦攪拌プロセスによる鋼表層への圧縮残留応力と残留オーステナイトの付与

    柳 悠輔, 山元 優士, 山本 啓, 伊藤 和博, 三上 欣希

    一般社団法人 溶接学会 2022年度秋季全国大会

  22. Toughening due to deformation induced martensitic transformation in delta ferrite-containing austenitic stainless steel weld metals

    Hajime Yamamoto, Reika Oda, Kazuhiro Ito, Hirofumi Maniwa, Yoshihiko Kitagawa, Hirohisa Watanabe

    The 75th IIW Assembly & International Conference

  23. 狭窄パルスTIG溶接を用いた異相界面複雑化によるAl/Cu接合強度の増加

    山本 啓, 柳 悠輔, 伊藤 和博, 古免 久弥, 田中 学, 村田 彰久

    一般社団法人 溶接学会 2022年度春季全国大会

  24. オーステナイト系ステンレス鋼溶接金属の加工誘起マルテンサイト変態による極低温じん性増加

    小田 怜佳, 山本 啓, 伊藤 和博, 馬庭 啓史, 北川 良彦, 渡邉 博久

    一般社団法人 溶接学会 2022年度春季全国大会

  25. Experimental study on improving the additively manufactured GMAW and TIG beads using FSP

    Murshid Imam, Sai Naga Sri, Harsha Chittajallu, Himanshu Gururani, Hajime Yamamoto, Kazuhiro Ito, Pradeep, Kumar Parchuri, Rajnish Mishra, Abhay Sharma, Ashutosh Richhariya, Viswanath Chinthapen

    International Conference on Materials, Mechanics & Modelling 2021 (ICMMM-2021)

  26. Explosion welding of W/Cu and Mo/Cu clads and related shock wave damages

    Kazuhiro Ito, Pradeep Kumar Parchuri, Shota Kotegawa, Hajime Yamamoto, Akihisa Mori, Kazuyuki Hokamoto

    International Conference on Materials Science and Engineering 2021

  27. 摩擦攪拌プロセス施工鋼表層の残留応力とWCツール構成元素固溶量との関係

    山元 優士, 山本 啓, 伊藤 和博, 三上 欣希

    一般社団法人 溶接学会 2021年度秋季全国大会

  28. 摩擦攪拌プロセス施工鋼表層のWCツール構成元素固溶量に及ぼす鋼化学成分の影響

    小田 怜佳, 山本 啓, 伊藤 和博, 高橋 誠

    一般社団法人 溶接学会 2021年度秋季全国大会

  29. Al/Cu異材薄板の狭窄TIG溶接

    山本 啓, 伊藤 和博, 高橋 誠, 田中 学, ヌエン ヴァン アン, 村田 彰久

    一般社団法人 溶接学会 2021年度秋季全国大会

  30. Al/Cu異材薄板の狭窄TIG溶接

    山本 啓, 伊藤 和博, 高橋 誠, 田中 学, ヌエン ヴァン アン, 村田 彰久

    公益社団法人 日本金属学会 2021年秋期(第169回)講演大会

  31. Feature of microstructure and its formation mechanism in a newly developed electro slag welding

    Tomonori Kakizaki, Shodai Koga, Hajime Yamamoto, Yoshiki Mikami, Kazuhiro Ito, Kei Yamazaki, Shuji Sasakura, Hirohisa Watanabe

    The 74th IIW on-line Assembly & International Conference

  32. Investigation of WC-tool-component solution mechanism arose in a steel surface layer during friction stir processing

    Hajime Yamamoto, Yudai Imagawa, Kazuhiro Ito

    The 74th IIW on-line Assembly & International Conference

  33. 摩擦攪拌プロセスによるWCツール構成元素の鋼中固溶機構

    山本 啓, 今川 雄大, 伊藤 和博

    一般社団法人 溶接学会 2021年度春季全国大会

  34. 摩擦攪拌プロセスによるWCツール構成元素の鋼中固溶機構

    山本 啓, 今川 雄大, 伊藤 和博

    公益社団法人 日本金属学会 2021年春期(第168回)講演大会

  35. 摩擦攪拌プロセスによる組織改質が低炭素鋼溶接部の破壊靱性に及ぼす影響

    山本 啓, 和泉 博貴, 伊藤 和博

    一般社団法人 スマートプロセス学会 2020年度学術講演会

  36. 極低温時の高導電率を低下させないための超高純度アルミニウム薄板の摩擦攪拌接合

    山本 啓, 青山 雄亮, 伊藤 和博, 山田 哲生, 田中 学, 星河 浩介, 永田 章, 熊谷 俊昭

    公益社団法人 日本金属学会 2020年秋期(第167回)講演大会

  37. 極低温時の高導電率を低下させないための超高純度アルミニウム薄板の摩擦攪拌接合

    山本 啓, 青山 雄亮, 伊藤 和博, 山田 哲生, 田中 学, 星河 浩介, 永田 章, 熊谷 俊昭

    一般社団法人 溶接学会 2020年度秋季全国大会

  38. エレクトロスラグ及びエレクトロガスアーク溶接における溶接金属中のアシキュラーフェライト量に及ぼすプロセス因子の影響

    古賀 将大, 山本 啓, 伊藤 和博, 柿崎 智紀, 山崎 圭, 笹倉 秀司, 渡邉 博久

    一般社団法人 溶接学会 2020年度秋季全国大会

  39. W alloying due to WC tool wear during friction stir processing for fatigue strength improvement of high-strength low-alloy steel joints

    Shodai Koga, Hajime Yamamoto, Kazuhiro Ito, Makoto Takahashi, Yoshiki Mikami, Hidetoshi Fujii

    The 5th International Symposium on Visualization in Joining & Welding Science through Advanced Measurements and Simulation (Visual-JW 2019) & The 8th International Conference of Welding Science and Engineering in conjunction with Symposium on the Research Activities of Joint Usage/Research Center on Joining and Welding

  40. Travel distance of stable WC-tool-wear related W alloying varying with friction stir processing parameters on low-carbon steel plates

    Yudai Imagawa, Hajime Yamamoto, Kazuhiro Ito

    The 5th International Symposium on Visualization in Joining & Welding Science through Advanced Measurements and Simulation (Visual-JW 2019) & The 8th International Conference of Welding Science and Engineering in conjunction with Symposium on the Research Activities of Joint Usage/Research Center on Joining and Welding

  41. Weld toe modification using friction stir processing for fatigue strength improvement of high-strength low-alloy steel joints

    Hajime Yamamoto, Yoshikazu Danno, Kazuhiro Ito, Yoshiki Mikami, Hidetoshi Fujii

    International Conference on Materials and Systems for Sustainability 2019 (ICMaSS2019) in conjunction with NU-NUS Symposium, Emerging Technologies for Next Generation Electric Power Systems, and International Symposium on Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development Satellite (iLIM-s)

  42. W alloying due to WC tool wear during friction stir processing for fatigue strength improvement of high-strength low-alloy steel joints

    Shodai Koga, Hajime Yamamoto, Kazuhiro Ito, Makoto Takahashi, Yoshiki Mikami, Hidetoshi Fujii

    The 4th International Symposium on Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development (iLIM-4) in conjunction with The 14th International Workshop on Biomaterials in Interface Science Innovative Research for Biosis-Abiosis Intelligent Interface Seminar 2019

  43. 摩擦攪拌プロセスによるWCツール構成元素の低炭素鋼表面への供給とその組織形成に及ぼすツール摩耗挙動の影響

    今川 雄大, 山本 啓, 伊藤 和博, 三上 欣希, 藤井 英俊

    一般社団法人 溶接学会 2019年度秋季全国大会

  44. A summary on microstructural features and mechanical properties of explosive welded group V, VI refractory metals Cu clads

    Pradeep Kumar Parchuri, Shota Kotegawa, Kazuhiro Ito, Hajime Yamamoto, Akihisa Mori, Kazuyuki Hokamoto

    公益社団法人 日本金属学会 2019年秋期(第165回)講演大会

  45. 摩擦攪拌プロセスによるWCツール構成元素の低炭素鋼表面への供給とその組織形成に及ぼすツール摩耗挙動の影響

    今川 雄大, 山本 啓, 伊藤 和博, 三上 欣希, 藤井 英俊

    公益社団法人 日本金属学会 2019年秋期(第165回)講演大会

  46. The benefits of workpiece vibration in tandem pulsed gas metal arc welding

    Habib Hamed Zargari, Kazuhiro Ito, Pradeep Kumar Parchuri, Hajime Yamamoto, Manish Kumar, Abhay Sharma

    公益社団法人 日本金属学会 2019年秋期(第165回)講演大会

  47. Effect of workpiece-vibration on penetration shape change of P-GMA welds

    Kazuhiro Ito, Habib Hamed Zargari, Hajime Yamamoto, Tsuyoshi Miwa, Pradeep Kumar Parchuri, Manish Kumar, Abhay Sharma

    The 72nd IIW Annual Assembly & International Conference

  48. 高強度低合金鋼溶接継手止端部への摩擦攪拌プロセスにおける施工条件と疲労強度改善の関係

    古賀 将大, 山本 啓, 伊藤 和博, 三上 欣希, 藤井 英俊

    一般社団法人 溶接学会 平成31年度春季全国大会

  49. Mo/Cu爆発圧接クラッド材の曲げ強度と接合界面の関係

    Pradeep Kumar Parchuri, 古手川 将大, 山本 啓, 伊藤 和博, 森 昭寿, 田中 茂, 外本 和幸

    一般社団法人 溶接学会 平成31年度春季全国大会

  50. 高強度低合金鋼溶接継手止端部への摩擦攪拌プロセスにおける施工条件と疲労強度改善の関係

    山本 啓, 古賀 将大, 伊藤 和博, 三上 欣希, 藤井 英俊

    公益社団法人 日本金属学会 2019年春期(第164回)講演大会

  51. Characterization of bending strength and interface microstructure in Mo/Cu explosive clads

    Pradeep Kumar Parchuri, Shota Kotegawa, Hajime Yamamoto, Kazuhiro Ito, Akihisa Mori, Shigeru Tanaka, Kazuyuki Hokamoto

    公益社団法人 日本金属学会 2019年春期(第164回)講演大会

  52. WCツールを用いた摩擦攪拌プロセスによる表面改質と機能性向上

    伊藤 和博, 山本 啓, 段野 芳和

    公益社団法人 日本金属学会 2019年春期(第164回)講演大会

  53. Direct application of friction stir processing to weld toes of high-strength low-alloy steel joints

    Hajime Yamamoto, Yoshikazu Danno, Kazuhiro Ito, Yoshiki Mikami, Hidetoshi Fujii

    TMS 2019 148th Annual Meeting & Exhibition

  54. Direct application of friction stir processing to weld toes of high-strength low-alloy steel joints

    Hajime Yamamoto, Yoshikazu Danno, Kazuhiro Ito, Yoshiki Mikami, Hidetoshi Fujii

    The International Symposium for Materials Scientists “Inspiration for Innovation by Interaction” (ISMS III)

  55. Advantages of intermediate-layer formation at the interface of Nb/Cu and Ta/Cu explosive clads over a wavy interface

    Pradeep Kumar Parchuri, Shota Kotegawa, Hajime Yamamoto, Kazuhiro Ito, Akihisa Mori, Kazuyuki Hokamoto

    4th International Conference “Welding and Failure Analysis of Engineering Materials” (WAFA-2018)

  56. Change for better in the penetration shape of twin-wire MAG welds using workpiece vibration

    Kazuhiro Ito, Habib Hamed Zargari, Hajime Yamamoto, Tsuyoshi Miwa, Pradeep Kumar Parchuri, Abhay Sharma, Manish Kumar

    4th International Conference “Welding and Failure Analysis of Engineering Materials” (WAFA-2018)

  57. Weld toe modification by friction stir processing using a spherical tip tool in high-strength low-alloy steel joints

    Hajime Yamamoto, Yoshikazu Danno, Kazuhiro Ito, Hidetoshi Fujii

    4th International Conference “Welding and Failure Analysis of Engineering Materials” (WAFA-2018)

  58. Direct application of friction stir processing to weld toes of high-strength low-alloy steel joints

    Hajime Yamamoto, Yoshikazu Danno, Kazuhiro Ito, Yoshiki Mikami, Hidetoshi Fujii

    The 3rd International Symposium on Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development (iLIM-3)

  59. Effect of yttrium addition on phase constitution and mechanical properties of a Ti—Cr—Sn biomedical alloy

    Minsoo Park, Akira Umise, Masaki Tahara, Hajime Yamamoto, Kazuhiro Ito, Hideki Hosoda

    The 3rd International Symposium on Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development (iLIM-3)

  60. Steel-surface modification by friction stir processing using a WC tool

    Kazuhiro Ito, Hajime Yamamoto, Yoshikazu Danno, Hidetoshi Fujii

    The 3rd International Symposium on Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development (iLIM-3)

  61. Workpiece vibration in twin-wire MAG welding for the benefit of penetration shape change

    Habib Hamed Zargari, Kazuhiro Ito, Hajime Yamamoto, Pradeep Kumar Parchuri, Abhay Sharma

    公益社団法人 日本金属学会 2018年秋期(第163回)講演大会

  62. Variation in the bending strength with collision velocity in W/Cu explosive welds

    Pradeep Kumar Parchuri, Shota Kotegawa, Hajime Yamamoto, Yoshiki Mikami, Kazuhiro Ito, Shigeru Tanaka, Kazuyuki Hokamoto

    公益社団法人 日本金属学会 2018年秋期(第163回)講演大会

  63. 爆発圧接したW/Cu接合体の曲げ特性と爆発圧接時の衝突速度との関係

    古手川 将大, Pradeep Kumar Parchuri, 伊藤 和博, 山本 啓, 田中 茂, 外本 和幸

    一般社団法人 溶接学会 平成30年度秋季全国大会

  64. Advantages of intermediate-layer formation at the interface of Nb/Cu and Ta/Cu explosive clads over a wavy interface

    Pradeep Kumar Parchuri, Shota Kotegawa, Hajime Yamamoto, Kazuhiro Ito, Akihisa Mori, Kazuyuki Hokamoto

    The 71st IIW Annual Assembly & International Conference

  65. Metallurgical characterization of penetration shape change in twin-wire MAG welds using workpiece-vibration

    Kazuhiro Ito, Hajime Yamamoto, Pradeep Kumar Parchuri, Abhay Sharma, Habib Hamed Zargari

    The 71st IIW Annual Assembly & International Conference

  66. 衝突速度と音速との関係が爆発圧接したRMs/Cu界面形状およびその機械的特性に与える影響

    Pradeep Kumar Parchuri, 古手川 将大, 山本 啓, 伊藤 和博, 外本 和幸

    一般社団法人 溶接学会 平成30年度春季全国大会

  67. 球面先端形状ツールを用いた摩擦攪拌プロセスによる低炭素鋼溶接余盛止端部組織と形状の改善およびそれらの疲労強度への効果

    山本 啓, 段野 芳和, 伊藤 和博, 三上 欣希, 藤井 英俊

    一般社団法人 溶接学会 平成30年度春季全国大会

  68. 球面先端形状ツールを用いた摩擦攪拌プロセスによる低炭素鋼溶接余盛止端部の組織および形状改善と疲労強度に及ぼす影響

    山本 啓, 段野 芳和, 伊藤 和博, 三上 欣希, 藤井 英俊

    公益社団法人 日本金属学会 2018年春期(第162回)講演大会

  69. A study on characteristics of explosively welded RMs/Cu joints at different relationship between horizontal-collision and sonic velocities

    Pradeep Kumar Parchuri, Shota Kotegawa, Hajime Yamamoto, Kazuhiro Ito, Kazuyuki Hokamoto

    公益社団法人 日本金属学会 2018年春期(第162回)講演大会

  70. Application of friction stir processing to high-tensile-steel welds

    Kazuhiro Ito, Hajime Yamamoto, Makoto Takahashi, Kazuyuki, Kohama, Hidetoshi Fujii

    3rd International Conference on Friction Based Processes (ICFP2017)

  71. Application of friction stir processing to high-tensile-steel welds

    Kazuhiro Ito, Hajime Yamamoto, Tatsuya Okuda, Hiroki Izumi, Makoto Takahashi, Kazuyuki Kohama, Hidetoshi Fujii

    The Conference of International Welding and Inspection Technology 2017 and The Conference of Thailand Welding and Inspection Technology 2017 (IWIT & TWIT 2017)

  72. Application of friction stir processing to high-tensile-steel welds

    Kazuhiro Ito, Hajime Yamamoto, Makoto Takahashi, Kazuyuki, Kohama, Hidetoshi Fujii

    7th International Conference on Welding Science and Engineering in conjunction with 3rd International Symposium on Computer-Aided Welding Engineering (WSE & CAWE 2017)

  73. Application of friction stir processing to weld toe

    Yoshikazu Danno, Hajime Yamamoto, Kazuhiro Ito, Yoshiki Mikami, Kazuyuki Kohama

    The 2nd International Symposium on Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development (iLIM-2)

  74. タンデムマグ溶接における溶融池内での溶滴流動に及ぼす被溶接材振動の影響

    山本 啓, 伊藤 和博, 三輪 剛士, Pradeep Kumar Parchuri, Abhay Sharma

    一般社団法人 溶接学会 平成29年度秋季全国大会

  75. Correlation between thermo-physical property to microstructure evolution of underwater explosive welds of Mo/Cu and W/Cu

    Pradeep Kumar Parchuri, Shota Kotegawa, Hajime Yamamoto, Kazuhiro Ito, Kazuyuki Hokamoto

    一般社団法人 溶接学会 平成29年度秋季全国大会

  76. 余盛止端部への摩擦攪拌プロセスの適用とその疲労強度改善効果

    段野 芳和, 山本 啓, 伊藤 和博, 三上 欣希, 小濱 和之

    一般社団法人 溶接学会 平成29年度秋季全国大会

  77. 過剰応力下低合金鋼での亜鉛脆化割れに及ぼす熱影響部組織・引張応力・溶融亜鉛温度の影響

    武藤 宏, 伊藤 和博, 山本 啓, 段野 芳和

    一般社団法人 溶接学会 平成29年度秋季全国大会

  78. Variation in bending strength and interface morphology of underwater explosive welded RM/Cu joints

    Pradeep Kumar Parchuri, Shota Kotegawa, Hajime Yamamoto, Kazuhiro Ito, Kazuyuki Hokamoto

    公益社団法人 日本金属学会 2017年秋期(第161回)講演大会

  79. 溶接余盛止端部への直接摩擦攪拌プロセスが疲労強度へ及ぼす効果

    段野 芳和, 山本 啓, 伊藤 和博, 三上 欣希, 小濱 和之

    公益社団法人 日本金属学会 2017年秋期(第161回)講演大会

  80. タンデムマグ溶接における溶融池内での溶滴流動に及ぼす被溶接材振動の影響

    山本 啓, 伊藤 和博, 三輪 剛士, Pradeep Kumar Parchuri, Abhay Sharma

    公益社団法人 日本金属学会 2017年秋期(第161回)講演大会

  81. Effects of surface-microstructural modification by friction stir processing on fatigue strength of fusion-welded high-tensile steels

    Hajime Yamamoto, Kazuhiro Ito, Makoto Takahashi, Kazuyuki, Kohama, Hidetoshi Fujii

    Interdisciplinary Symposium for Up-and-coming Material Scientists 2017 (ISUMS 2017)

  82. 摩擦攪拌プロセスにより微細化された高張力鋼溶接部組織のシャルピー吸収エネルギー

    山本 啓, 段野 芳和, 伊藤 和博, 小濱 和之, 藤井 英俊

    一般社団法人 溶接学会 平成29年度春季全国大会

  83. 水中衝撃波を用いた第5族金属と銅との異材接合界面評価

    古手川 将大, 山本 啓, Pradeep Kumar Parchuri, 高橋 誠, 伊藤 和博, 外本 和幸

    一般社団法人 溶接学会 平成29年度春季全国大会

  84. Si/Al混合粉末ろう材のAl蒸発による等温凝固を用いたSiCの低温接合

    小濱 和之, 寺田 俊一, 伊藤 和博, 山本 啓, 篠原 貴彦, 坂元 理絵

    一般社団法人 溶接学会 平成29年度春季全国大会

  85. Characterization of dissimilar bonding of Cu to Ta and Nb by the underwater explosive welding

    Pradeep Kumar Parchuri, Shota Kotegawa, Hajime Yamamoto, Kazuhiro Ito, Kazuyuki Hokamoto

    公益社団法人 日本金属学会 2017年春期(第160回)講演大会

  86. 摩擦攪拌プロセスにより微細化された高張力鋼溶接熱影響部組織のシャルピー衝撃値

    山本 啓, 段野 芳和, 伊藤 和博, 小濱 和之, 藤井 英俊

    公益社団法人 日本金属学会 2017年春期(第160回)講演大会

  87. 共晶系Si-Alろう材のAl蒸発による等温凝固を用いたSiCの低温接合

    小濱 和之, 寺田 俊一, 伊藤 和博, 山本 啓, 篠原 貴彦, 坂元 理絵

    公益社団法人 日本金属学会 2017年春期(第160回)講演大会

  88. Fatigue-strength increase by friction stir processing between different strength grades of butt-welded high-tensile steels

    Hajime Yamamoto, Kazuhiro Ito, Makoto Takahashi, Kazuyuki, Kohama, Hidetoshi Fujii

    TMS 2017 146th Annual Meeting & Exhibition

  89. Friction-stir-processing microstructure improvement related to fatigue-strength and Charpy-absorbed-energy increase of TIG-welded SS400 steels

    Kazuhiro Ito, Tatsuya Okuda, Hiroki Izumi, Makoto Takahashi, Kazuyuki, Kohama, Hajime Yamamoto, Hidetoshi Fujii

    TMS 2017 146th Annual Meeting & Exhibition

  90. In-situ observation of semisolid Fe–2.5C–1.5Si gray cast iron

    Davi Munhoz Benati, Kazuhiro Ito, Kazuyuki Kohama, Hajime Yamamoto, Eugenio José Zoqui

    Materials Science & Technology 2016 (MS&T16)

  91. Interface-microstructure characterization of dissimilar joints between group 5 refractory metals and copper produced by underwater explosive welding

    Shota Kotegawa, Hajime Yamamoto, Kazuhiro Ito, Kazuyuki Hokamoto

    The 4th International Symposium on Visualization in Joining & Welding Science through Advanced Measurements and Simulation (Visual-JW 2016) in conjunction with Symposium on the Research Activities of Joint Usage / Research Center on Joining and Welding and The 1st International Symposium on Creation of Life Innovation Materials for Interdisciplinary and International Research Researcher Development (iLIM-1)

  92. Effects of surface-microstructural modification on fatigue strength of high tensile steel welds by friction stir processing

    Hajime Yamamoto, Kazuhiro Ito, Makoto Takahashi, Kazuyuki Kohama, Hidetoshi Fujii

    The 4th International Symposium on Visualization in Joining & Welding Science through Advanced Measurements and Simulation (Visual-JW 2016) in conjunction with Symposium on the Research Activities of Joint Usage / Research Center on Joining and Welding and The 1st International Symposium on Creation of Life Innovation Materials for Interdisciplinary and International Research Researcher Development (iLIM-1)

  93. Investigation on cooling strategies during wire arc additive layer manufacturing

    Abhay Sharma, Jayprakash Sharma, Kazuhiro Ito, Surya S. Kumar, Hajime Yamamoto, Kazuyuki Kohama

    The 4th International Symposium on Visualization in Joining & Welding Science through Advanced Measurements and Simulation (Visual-JW 2016) in conjunction with Symposium on the Research Activities of Joint Usage / Research Center on Joining and Welding and The 1st International Symposium on Creation of Life Innovation Materials for Interdisciplinary and International Research Researcher Development (iLIM-1)

  94. Increase in fatigue strength of butt-welded high-tensile steel joints by friction stir processing

    Hajime Yamamoto, Kazuhiro Ito, Makoto Takahashi, Kazuyuki Kohama, Hidetoshi Fujii

    10th International Conference on Trends in Welding Research & 9th International Welding Symposium of Japan Welding Society (9WS)

  95. Increase in fatigue strength and Charpy absorbed energies of TIG-welded SS400 steel plates by friction-stir-processing grain-refinement

    Kazuhiro Ito, Tatsuya Okuda, Hiroki Izumi, Makoto Takahashi, Hajime Yamamoto, Hidetoshi Fujii

    10th International Conference on Trends in Welding Research & 9th International Welding Symposium of Japan Welding Society (9WS)

  96. 低入熱摩擦攪拌プロセスによる極薄セメンタイト膜に包まれた超微細フェライト粒組織の形成とシャルピー吸収エネルギーの増加

    伊藤 和博, 和泉 博貴, 山本 啓, 高橋 誠, 小濱 和之, 藤井 英俊

    公益社団法人 日本金属学会 2016年秋期(第159回)講演大会

  97. Si微粒子ペーストとAlを用いたSiC接合における再溶融温度を高温維持した接合温度低減

    寺田 俊一, 小濱 和之, 山本 啓, 伊藤 和博

    一般社団法人 溶接学会 平成28年度秋季全国大会

  98. 低合金炭素鋼の溶接部・母材の溶融亜鉛脆化割れに及ぼす負荷応力と組織の影響

    武藤 宏, 段野 芳和, 山本 啓, 伊藤 和博

    一般社団法人 溶接学会 平成28年度秋季全国大会

  99. ダブルワイヤミグ溶接時の溶融池振動が及ぼす低炭素鋼溶接部の機械特性変化への組織からの評価

    三輪 剛士, 山本 啓, 伊藤 和博, 小濱 和之, Abhay Sharma

    一般社団法人 溶接学会 平成28年度秋季全国大会

  100. 摩擦攪拌プロセスが形成したセメンタイト膜に包まれた超微細フェライト粒組織の液体窒素温度におけるシャルピー吸収エネルギーと延性破面 —他の入熱条件と比較して—

    伊藤 和博, 和泉 博貴, 山本 啓, 高橋 誠, 小濱 和之, 藤井 英俊

    一般社団法人 溶接学会 平成28年度秋季全国大会

  101. 多孔質マイクロ球状粒子の自発的生成挙動の高温その場観察

    鈴木 義和, 阿部 浩也, 山本 啓, 伊藤 和博, 井上 裕滋, 中村 誠友己

    公益社団法人 日本セラミックス協会 第29 回秋季シンポジウム

  102. Effects of friction-stir-processing grain-refinement on fatigue strength and Charpy absorbed energies of TIG-welded SS400 steel plates

    Kazuhiro Ito, Tatsuya Okuda, Hiroki Izumi, Makoto Takahashi, Hajime Yamamoto, Hidetoshi Fujii

    The 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM9)

  103. 摩擦攪拌プロセスによる高張力鋼突合せ溶接部の引張疲労強度増加

    山本 啓, 伊藤 和博, 小濱 和之, 藤井 英俊

    一般社団法人 溶接学会 平成28年度春季全国大会

  104. 摩擦攪拌プロセスによる高張力鋼突合せ溶接部の引張疲労強度増加

    山本 啓, 伊藤 和博, 小濱 和之, 藤井 英俊

    公益社団法人 日本金属学会 2016年春期(第158回)講演大会

  105. Increase of tensile fatigue resistance for high-tensile steel welds using friction stir processing

    Hajime Yamamoto, Kazuhiro Ito, Kazuyuki Kohama

    The 2nd International Symposium of Interactive Materials Science Cadet Program (iSIMSC 2)

  106. Increase of fatigue strength of high-tensile steel welds with increase of yield stress using friction stir processing

    Ryota Yamasaki, Kazuhiro Ito, Kazuyuki Kohama, Makoto Takahashi, Hajime Yamamoto, Hidetoshi Fujii, Rintaro Ueji, Chiaki Shiga

    3rd International Conference in Africa and Asia “Welding and Failure Analysis of Engineering Materials” (WAFA-2015)

  107. 摩擦攪拌プロセスによる溶接部疲労強度増加に及ぼす母材強度の影響

    山﨑 亮太, 伊藤 和博, 小濱 和之, 高橋 誠, 山本 啓

    公益社団法人 日本金属学会 2015年秋期(第157回)講演大会

  108. 摩擦攪拌プロセスによる溶接部疲労強度増加に及ぼす母材強度の影響

    山﨑 亮太, 伊藤 和博, 小濱 和之, 高橋 誠, 山本 啓, 藤井 英俊, 上路 林太郎, 志賀 千晃

    一般社団法人 溶接学会 平成27年度秋季全国大会

  109. In-situ characterization of transient liquid phase bonding of steel alloys

    Hidenori Terasaki, Hajime Yamamoto, Yu-ichi Komizo

    The 3rd International Symposium on Visualization in Joining & Welding Science through Advanced Measurements and Simulation (Visual-JW 2014)

  110. Refinement of the CGHAZ of high-strength steel using Fe–Si–B amorphous sheet

    Hidenori Terasaki, Hajime Yamamoto, Yu-ichi Komizo

    The 5th International Symposium on Advanced Materials Development and Integration of Novel Structured Metallic and Inorganic Materials (AMDI-5)

  111. Fracture toughness increase by friction-stir-processing microstructure modification in TIG-welds of SS400 steels

    Kazuhiro Ito, Hiroki Izumi, Hajime Yamamoto, Makoto Takahashi, Kazuyuki Kohama, Yoshikazu Danno, Hidetoshi Fujii

    The 4th International Symposium on Visualization in Joining & Welding Science through Advanced Measurements and Simulation (Visual-JW 2016) in conjunction with Symposium on the Research Activities of Joint Usage / Research Center on Joining and Welding and The 1st International Symposium on Creation of Life Innovation Materials for Interdisciplinary and International Research Researcher Development (iLIM-1)

Industrial Property Rights 2

  1. ALUMINUM MEMBER AND MANUFACTURING METHOD THEREOF

    ITO Kazuhiro, YAMAMOTO Hajime, NAGATA Akira, HOSHIKAWA Hiroaki

    ZL202180059555.1

    出願日:2023/01/19

    登録日:2024/12/27

  2. アルミニウム部材およびその製造方法

    伊藤 和博, 山本 啓, 永田 章, 星河 浩介

    出願日:2020/07/30

    登録日:2022/02

Institutional Repository 2

Content Published in the University of Osaka Institutional Repository (OUKA)
  1. Compressive residual stress applied to a low-carbon steel surface alloyed with WC tool constituent elements according to friction stir processing

    Yamamoto Hajime, Yamamoto Yuji, Ito Kazuhiro, Mikami Yoshiki

    Materials and Design Vol. 244 2024/08/01

  2. 摩擦攪拌プロセスによる低炭素鋼溶接部の疲労強度改善に関する研究

    山本 啓