2025.4.23（Wed）

Awards and Commendations

Shohei, Uranaka (Assistant Professor) received Sawamura Award at The Iron and Steel Institute of Japan (ISIJ)

Date of Award：2025-03-08

Name, Faculty/Graduate School, Department (Stream / Program) / Major: ：Department of Systems Innovation, Kawabata Lab

Name of the award and a short explanation about the award："Sawamura Award" An award presented to authors of papers published in the English-language academic journal "ISIJ International" during the previous year that are deemed to be the most academically and technically beneficial.

About awarded research："Quantitative Analysis of Hardening Due to Carbon in Solid Solution in Martensitic Steels" In carbon steels, controlling the hardness of the martensite microstructure is important for achieving high strength and high performance. However, while it is understood that the hardness of martensite is influenced by solid solution carbon, dislocations, grain size, and precipitates, the extent of each influence has not been clearly explained. In this paper, we quantitatively evaluate the influence of solid solution C on martensite hardness and attempt to elucidate the origin of martensite hardness. By quantitatively determining solid solution C through electrical resistivity measurements and precisely quantifying dislocation density and microstructure, we quantitatively evaluated the effects of solid solution C, dislocations, precipitates, grain boundaries, and restained austenite on strength and hardness, clearly demonstrating that solid solution C significantly contributes to strength development.

Awardee's impression & future plan：I am truly honored to receive this prestigious award. I would like to express my sincere gratitude to my co-authors for their invaluable guidance and support in the writing of this paper. I will continue to devote myself to contributing to the advancement of steel materials.