Yamamoto Hajime

ヤマモトハジメ | Yamamoto Hajime

Affiliation and department：
Job title： Assistant Professor
Homepage URL (1)： http://www.jwri.osaka-u.ac.jp/research/research02_1.html

Research field (4)： Composite materials and interfaces , Structural and functional materials , Material fabrication and microstructure control , Manufacturing and production engineering

Research keywords (10)： Friction stir welding , Friction stir processing , Solid state joining , Additive manufacturing , Dissimilar welding , Surface modification , Composite , Wear , Surfaces and interfaces , Steel

Research theme for competitive and other funds (7)：

2023 - 2024 ハイエントロピー効果を活用した金属間化合物フリーAl/Fe異種金属接合
2023 - 2024 IMCフリーな異材接合界面の形成に向けた高濃度多元系溶接材料の探索
2021 - 2024 Simultaneous control of surface microstructure and residual stress using solid solution of tool elements during friction stir processing
2022 - 2023 摩擦攪拌加工におけるツール摩耗因子の明確化と新規ツール材料の開発
2020 - 2023 鉄鋼材料における摩擦攪拌加工中のツール摩耗を利用した表面合金化技術の開発

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Papers (39)：

Hajime Yamamoto, Yuji Yamamoto, Kazuhiro Ito, Yoshiki Mikami. Compressive residual stress applied to a low-carbon steel surface alloyed with WC tool constituent elements according to friction stir processing. Materials & Design. 2024. 244. 113225
Hajime Yamamoto, Yusuke Yanagi, Kazuhiro Ito, Hisaya Komen, Manabu Tanaka, Akihisa Murata. Strengthening of Al/Cu dissimilar joint due to complicated interface produced by pulsed TIG welding with a constricted nozzle. Welding International. 2023. 37. 12. 718-729
Hajime Yamamoto, Yuji Yamamoto, Kazuhiro Ito, Yoshiki Mikami. Adapted to generate compressive residual stress and retained austenite in a steel surface layer by friction stir processing with the WC tool. Proceedings of The 76th IIW Annual Assembly. 2023. IX-L-1272-2023
Hajime Yamamoto, Yusuke Yanagi, Kazuhiro Ito, Hisaya Komen, Manabu Tanaka, Akihisa Murata. Strengthening of Al/Cu dissimilar joint due to complicated interface produced by pulsed TIG welding with a constricted nozzle. Quarterly Journal of the Japan Welding Society. 2023. 41. 1. 168-177
Mei Liu, Lanting Zhang, Bingbing Zhao, Fugang Chen, Xianshuang Xia, Yongjiang Yu, Hajime Yamamoto, Kazuhiro Ito. Orientation dependence of plastic deformation of sintered Nd-Fe-B magnets at high temperature. Acta Materialia. 2022. 244. 118559

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MISC (9)：

Tomoya Asayama, Tsuyoshi Miwa, Tomoki Matsuda, Hajime Yamamoto, Issei Uchino. Report of WELNET evening forum at JWS national meeting in Spring 2024 & Report of the 70th meeting of WELNET steering committee. Journal of the Japan Welding Society. 2024. 93. 6. 405-406
Hajime Yamamoto. Formation of hook-shaped interface in Al/Cu dissimilar thin sheet joint by pulsed TIG welding with a constricted nozzle. Journal of Light Metal Welding. 2023. 61. 10. 15-21
Hajime Yamamoto. Interview. Journal of Light Metal Welding. 2023. 61. 6. 56-57
山本啓. 超高純度アルミニウムのクリーン接合. WE-COMマガジン. 2022. 46. 1-8
Hajime Yamamoto, Kazuki Kasano, Keigo Tnaka. A preface young and energetic professionals -Digital transformation (DX) of welding industries-. Journal of the Japan Welding Society. 2022. 91. 6. 436-436

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Patents (1)：

アルミニウム部材およびその製造方法

Lectures and oral presentations (110)：

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
(一般社団法人溶接学会 2024年度秋季全国大会)
銅溶接金属中へのカーボンナノチューブ添加の検討
(一般社団法人溶接学会 2024年度春季全国大会)
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
(一般社団法人溶接学会 2024年度春季全国大会)
Alloying of low-carbon steel surface due to friction stir processing with WC tool wear
(The 3rd Materials Research Meeting (MRM2023) / The 24th IUMRS-International Conference in Asia (IUMRS-ICA2023))
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
(公益社団法人日本金属学会 2023年秋期(第173回)講演大会)

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Education (2)：

2014 - 2019 Osaka University Graduate School of Engineering Division of Materials and Manufacturing Science
2010 - 2014 Kansai University Faculty of Chemistry, Materials and Bioengineering Department of Chemistry and Materials Engineering

Professional career (1)：

Dr. Eng. (Osaka University)

Work history (1)：

2019/02 - 現在 Osaka University Joining and Welding Research Institute Assistant Professor

Committee career (5)：

2024/04 - 現在一般社団法人溶接学会全国大会運営委員会委員
2024/04 - 現在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
2023/01 - 現在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
2020/04 - 2024/03 一般社団法人溶接学会編集委員会委員
2019/04 - 2024/03 一般社団法人溶接学会若手会員の会運営委員会委員

Awards (8)：

2021/09 - 国立大学法人大阪大学接合科学研究所接合科学共同利用・共同研究賞爆発圧接法によって接合された高融点金属薄板材料の異材接合界面の組織評価
2021/04 - 一般社団法人溶接学会溶接学会論文奨励賞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
2020/12 - 一般社団法人溶接学会 2020年度溶接学会全国大会優秀研究発表賞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
2020/11 - 一般社団法人スマートプロセス学会論文賞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靭性に及ぼす影響
2019/11 - International Symposium on Creation of Life Innovation Materials for Interdiscriplinary and International Researcher Development Satellite (iLIM-s) Excellent Presentation Award Weld Toe Modification using Friction Stir Processing for Fatigue Strength Improvement of High-Strength Low-Alloy Steel Joint

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Association Membership(s) (4)：

The Iron and Steel Institute of Japan , Smart Processing Society for Materials, Environment & Energy , The Japan Institute of Metals and Materials , Japan Welding Society

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