Simulation of dislocation recovery in lath martensite steels using the phase-field method

被引：17

作者：

Furukawa, Sho ^{[1
]}

Ihara, Hiroto ^{[1
]}

Murata, Yoshinori ^{[1
]}

Tsukada, Yuhki ^{[1
]}

Koyama, Toshiyuki ^{[1
]}

机构：

[1] Nagoya Univ, Grad Sch Engn, Dept Mat Phys & Energy Engn, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648603, Japan

来源：

COMPUTATIONAL MATERIALS SCIENCE | 2016年 / 119卷

基金：

日本学术振兴会;

关键词：

Phase field; Recovery; Dislocation dynamics; Lath martensite; Microstructure; MODEL; RECRYSTALLIZATION; CRYSTALLOGRAPHY; MORPHOLOGY;

D O I：

10.1016/j.commatsci.2016.03.044

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Simulation of dislocation recovery using the phase-field method is used to clarify the collapse process of the lath martensite phase in high-Cr ferritic steels, in which densely packed and tangled dislocations exist. Edge dislocations move more rapidly than screw dislocations at elevated temperatures, and when stress is applied, the tendency becomes more pronounced. Dislocations form sub-boundaries, a so-called polygonization structure, in order to decrease the total energy. The size of the sub-boundary is estimated to be smaller than the lath width. As a result, it is found that collapse of the lath martensite microstructure starts with the division of laths caused by dislocation rearrangement. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：108 / 113

页数：6

共 15 条

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