Strain hardening behavior of a Fe-18Mn-0.6C-1.5Al TWIP steel
Strain hardening behavior of a Fe-18Mn-0.6C-1.5Al TWIP steel
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DOI：
10.1016/j.msea.2009.08.028
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发表时间：
2009-12-15
期刊：
影响因子：
6.4
通讯作者：
Lee, Young-Kook
中科院分区：
文献类型：
--
作者：
Jin, Jae-Eun;Lee, Young-Kook
采用修正的Crussard-Jaoul（C-J）分析和显微组织观察研究了Fe-18 Mn-0.6C-1.5Al马氏体钢的应变硬化行为。由修正C-J分析得到的应变硬化率高达37%的临界应变，然后大大降低，进一步应变。电子背散射衍射（EBSD）观察表明，当应变超过34%左右时，变形孪生率大大降低，表明大应变区应变硬化率的降低归因于变形孪生率的减慢。孪晶区的体积分数随拉伸应变的增加而增加，这是由于形变孪晶数量的增加，而不是由于每个形变孪晶的横向生长。(C)2009 Elsevier B. V.保留所有权利。
The strain hardening behavior of a Fe-18Mn-0.6C-1.5Al TWIP steel was investigated through the modified Crussard-Jaoul (C-J) analysis and microstructural observations. The strain hardening rate obtained by modified C-J analysis was high up to the critical strain of 37% and then greatly decreased with further strain. The electron backscatter diffraction (EBSD) observation showed that the deformation twinning rate is greatly decreased beyond about 34% strain, indicating that the reduced strain hardening rate at the large strain region is attributed to the deceleration of deformation twinning rate. The volume fraction of twinned region was increased with tensile strain due to the increase in the number of deformation twins not to the lateral growth of each deformation twin. (C) 2009 Elsevier B.V. All rights reserved.