Revisit the role of deformation twins on the work-hardening behaviour of twinning-induced plasticity steels

被引：102
|
作者：
Luo, Z. C.
Huang, M. X. [1 ]
机构：
[1] Univ Hong Kong, Shenzhen Inst Res & Innovat, Shenzhen, Peoples R China
来源：
SCRIPTA MATERIALIA | 2018年 / 142卷
基金：
中国国家自然科学基金;
关键词：
TWIP steel; Strain rate sensitivity; Dislocation density; Dynamic strain aging; Synchrotron X-ray diffraction; STACKING-FAULT ENERGY; FLOW-STRESS; TEMPERATURES; DEPENDENCE; MECHANISMS; EVOLUTION; MODEL; GRAIN;
D O I：
10.1016/j.scriptamat.2017.08.017
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The present study found that the work-hardening rate and dislocation density in a twinning-induced plasticity (TWIP) steel deformed at 373 K and 473 K are comparable to that deformed at 298 K, but deformation twins are considerably prohibited at 373 and 473 K. High dislocation density induced by dynamic strain aging (DSA) is the dominant mechanism responsible for the high work -hardening rate of TWIP steels at 373 and 473 K. It indicates that TWIP steels can also achieve high working-hardening rate without the formation of deformation twins. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：28 / 31
页数：4
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