Roles of Thermomechanical Processing on Microstructure Control of High Strength Steels

主讲人 : Prof. Tadashi Furuhara

Since the early 1960s, various kinds of thermomechanical processing have been developed for improving the strength and ductility/toughness balance of high-strength steels. The major interest was in grain size control, and hot deformation of the austenite matrix was useful in refining the final microstructure after phase transformation into ferrite, bainite, and martensite structures during cooling. In the 1990s and 2000s, severe plastic deformation attracted significant interest for achieving an ultrafine-grained structure, and the essences of such metallurgical concepts were also explored for possible applications in production. It should be mentioned that new dynamic phenomena were recognized in phase transformation and recrystallization during those investigations. Recently, the importance of re-heating processes has been emphasized to positively utilize microstructure inhomogeneities in the research of advanced high-strength steels. In this lecture, the importance of such technology, as well as its future perspectives, will be discussed from fundamental viewpoints of physical metallurgy.

主讲人简介：

Tadashi Furuhara，教授，博士生导师，日本东北大学材料研究所所长、教授。先后获日本京都大学硕士学位，美国卡内基梅隆大学博士学位。曾任日本京都大学助理教授和副教授，2005年晋升为日本东北大学教授。主要研究领域包括钢铁和有色金属的物理冶金学，如相变/析出、形变/再结晶、基于热机械/热化学方法的微观组织控制。已在国际学术刊物上发表了256篇研究论文，91篇国际会议论文，62篇综述文章，合著了16本书，论文引用次数13256次，H-因子 60，获奖26次/个，包括英国矿业协会 Vandium Award(2022),国际相变学会Hillert-Cahn  Award（2022）,日本金属与材料学会Excellent microscopy award （2021），日本金属材料研究所谷川哈里斯奖（2015年）、日本钛学会技术奖（2006年）、日本钢铁研究所西山纪念奖（2000年）等多项奖项。

Tadashi Furuhara教授积极为冶金领域各学术团体作出贡献，曾是日本金属学会副会长和日本铁钢协会副会长，且一直是矿物、金属和材料学会（TMS）相变委员会和钢铁委员会成员，目前担任Acta Materialia和 a Materialia编辑。国际相变委员会、钢铁协会、美国TMS委员，日本东北大学金属材料研究所所长，日本钢铁协会会长。