KEITA MARUMOTO

Last Updated :2026/05/08

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Assistant Professor
E-mail
marukhiroshima-u.ac.jp
Other Contact Details
1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan, Japan
TEL : (+81)82-424-2365 FAX : (+81)
Self-introduction
My research focuses on the development of new processes and automation technologies using image processing for welding and additive manufacturing. I am also conducting research on welding metallurgy.

Basic Information

Educational Backgrounds

  • Hiroshima university, Graduate School of Advanced Science and Engineering, Japan, 2020/04, 2022/03
  • Hiroshima university, Graduate School of Advanced Science and Engineering, Japan, 2022/04, 2025/03

Academic Degrees

  • Hiroshima University
  • Hiroshima University

Research Fields

  • Engineering;Material engineering;Material processing / Microstructural control engineering

Research Keywords

  • Welding, Additive manufacturing, Hot-wire, Image processing

Affiliated Academic Societies

  • The Japan Institute of Metals and Materials, 2025/10
  • The Iron and Steel Institute of Japan, 2025/10
  • The Japanese Institute of Additive Manufacturing, 2025/09
  • Japan Welding Society, 2020/04
    Related URL

Educational Activity

Course in Charge

  1. 2026, Undergraduate Education, Second Semester, Experiments in Mechanical Engineering II
  2. 2026, Undergraduate Education, First Semester, Experiments in Mechanical Engineering

Research Activities

Academic Papers

  1. Effect of the hot-wire laser irradiation method and a Ni-based alloy middle layer on mechanical properties and microstructure in additive manufacturing of WC–Co cemented carbide, International Journal of Refractory Metals and Hard Materials, 136, 20260401
  2. High-Magnification In Situ Observation of Welding Solidification, Metals, 15(11), 20251101
  3. Report of Attendance at IIW 2025 (78th IIW Annual Assembly and International Conference), Yosetsu Gakkai Shi Journal of the Japan Welding Society, 94(8), 478-480, 20250101
  4. In-situ characterization of the welding velocity-dependent solidification cracking dynamics in 310S stainless steel, Materials and Design, 265, 20260501
  5. In-plane constraint and relaxation type technology for the evaluation of solidification cracking susceptibility, JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, 38, 5263-5273, 2025
    Link to Paper Search Results by DOI
  6. Weld Formation and Characteristics of Hot-Wire Laser Welding in Aluminum Alloy Narrow-Gap Joints, METALS, 15(7), 20250718
    Link to Paper Search Results by DOI
  7. Effect of Hardness Distribution on Strength of Narrow-Gap Hot-Wire Laser-Welded Joint for High-Tensile Strength Steel, Materials, 18(2), 20250101
  8. Development of automation and monitoring methods for narrow-gap hot-wire laser welding using camera images, Welding in the World, 69(1), 269-280, 20250101
  9. Development of Hot-Wire Laser Additive Manufacturing for Dissimilar Materials of Stainless Steel/Aluminum Alloys, Journal of Manufacturing and Materials Processing, 8(3), 20240601
  10. Selection of Welding Conditions for Achieving Both a High Efficiency and Low Heat Input for Hot-Wire Gas Metal Arc Welding, Journal of Manufacturing and Materials Processing, 8(2), 20240401
  11. Bead shape control in high-speed fillet welding using hot-wire GMA laser hybrid welding technology, Welding in the World, 67(5), 1259-1266, 20230501
  12. Development of Hot-wire Laser Narrow-gap Multilayer Welding Technology, Yosetsu Gakkai Shi/Journal of the Japan Welding Society, 92(7), 458-461, 20230101
  13. Effect of Bead Shape on Solidification Cracking during Hot-wire Laser Welding on Narrow-gap Joint of Ni-base Alloy, Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society, 42(2), 89-96, 20240101

Invited Lecture, Oral Presentation, Poster Presentation

  1. High-Efficiency and Low-Heat-Input Additive Manufacturing Using Hot-Wire Laser Wire DED, Keita Marumoto, Keita Marumoto, Kumi Kodama, Insua Pinmanee, Motomichi Yamamoto, Daiji Morita, Yasutomo Tanihara, SLPC2026, 2026/04/21, With Invitation, English
  2. Hot-wire laser additive manufacturing technology for dissimilar materials of stainless steel / aluminum alloys, Keita Marumoto, Daiji Morita, Motomichi Yamamoto, LAMP2025, Without Invitation, English
  3. Microstructure and mechanical properties of heat-treated high-strength aluminum alloys fabricated by the hot-wire laser method, K. Marumoto, K. Kodama, T. Horai, D. Morita, M. Yamamoto, The 78th International Institute of Welding (IIW) Annual Assembly, 2025/06/25, Without Invitation, English