Different Mechanisms of ε-M and α'-M Variant Selection and the Influencing Factors of ε-M Reversion During Dynamic Tension in TRIP Steel
Different Mechanisms of ε-M and α'-M Variant Selection and the Influencing Factors of ε-M Reversion During Dynamic Tension in TRIP Steel作者机构:School of Materials Science and Engineering University of Science and Technology Beijing Department of Materials School of Tianjin University of Science and Technology Beijing
出 版 物:《Acta Metallurgica Sinica(English Letters)》 (金属学报(英文版))
年 卷 期:2018年第31卷第5期
页 面:449-455页
核心收录:
学科分类:08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程(可授工学、理学学位)]
基 金:financially supported by the National Natural Science Foundation of China (No. 51271028)
主 题:TRIP-assisted steel Dynamic plastic deformation Martensitic transformation Variantselection Orientation relationship
摘 要:The variant selection of martensites(ε-M and α'-M) and ε-M reversion in dynamic tensile high-manganese TRIP steel were investigated. α'-M variant pairs with a zigzag morphology frequently formed, and the pairs of neighboring α'-M variants were examined in terms of mechanical work and strain energy reduction. The occurrence of a primary α'-M variant is determined by mechanical work, but high products of mechanical work and strain energy reduction are essential for secondary variant selection. In contrast to α'-M variant pair selection, ε-M variant selection can be attributed to the highest mechanical work. During ε-M→α'-M transformation, the mechanical work of ε-M reversion is higher than that of α'-M variant, thereby implying that ε-M reversion in h110 icgrain is possible. e-M plate distribution also affects the feasibility of ε-M reversion.