Ibaraki University's
Graduate School of Science and Engineering (Engineering)
Department of Materials Science and Engineering



Academic degrees

  1. Doctor of Engineering The University of Tokyo 1995

Research Areas

  1. Structural/Functional Materials

Research keywords

  1. Electron microscopy, Grain boundary and Interface, Welding


  1. Research paper (scientific journal) Joint Microstructure of Joint between Stranded Wire and Substrate Welded by Ultrasonic Welding Chihiro Iwamoto, Keisuke Yamauchi, Kazuki Motomura, Yoichi Hashimoto and Kensuke Hamada Applied Science MDPI 9/ 534 2019/02/05 10.3390/app9030534
  2. (MISC) Prompt report, short report, and research note, etc. (scientific journal) Joint Microstructure of Ag-Cu-Pd Alloy Wires Hardened by Heat Treatment Chihiro Iwamoto, Mitsuhiro Saito, Fumio Watanabe, Risei Koitabashi Materia Japan 58/ 2, 79 2019/02/01 10.2320/materia.58.79
  3. Research paper (scientific journal) Joint Microstructure and Mechanical Properties of a Cu-Pd-Ag Alloy Wire with Aging Treatment Chihiro Iwamoto, Fumio Watanabe, Risei Koitabashi Materials Science Forum 941, 1167-1172 2018/12/26 1662-9752
  4. Research paper (scientific journal) Joint Change of LPSO Phases Morphology in Extruded Mg96Zn2Y2 Alloy Joints during Ultrasonic Spot Welding Process Y. Higashi, C. Iwamoto, Y. Kawamura Transactions of the Materials Research Society of Japan 43/ 5, 263-266 2018/10
  5. Research paper (scientific journal) Joint Relationship between anisotropy of extruded Mg-Zn-Y alloy and ultrasonic spot weldability Y. Hoshi, C. Iwamoto, Y. Higashi Quarterly Journal of the JWS 溶接学会 36/ 3, 185-192 2018/09/04 0288-4771 10.2207/qjjws.36.185

Research presentations

  1. Oral presentation(general) 超音波接合された複線ワイヤの微細組織 溶接学会春季全国大会 2019/04/18
  2. Oral presentation(general) 熱処理によるAg-Cu-Pd合金ワイヤの微細組織と硬度変化 日本金属学会春期全国大会 2019/03/20
  3. Poster presentation Ag-Cu-Pd合金の微細組織と強度の関係 第25回「エレクトロニクスにおけるマイクロ接合・実装技術」シンポジウム Mate2019 2019/01/29
  4. Poster presentation ウェッジボンディングされたCu複線ワイヤの微細組織 第25回「エレクトロニクスにおけるマイクロ接合・実装技術」シンポジウム Mate2019 2019/01/29
  5. Poster presentation Microstructure of LPSO type Mg alloy Joints controlled amount of dent that occurred by ultrasonic welding 4th International Conference on Nanojoining and Microjoining 2018 2018/12/02

Memberships of academic societies

  1. The Japan Society of Mechanical Engineers
  2. The Japanese Society of Microscopy
  3. The Japan Institute of Metals and Materials
  4. Japan Welding Society