On the origin of dynamic strain aging in twinning-induced plasticity steels

被引：321
|
作者：
Lee, Seok-Jae [1 ]
Kim, Jinkyung [1 ]
Kane, Shashank N. [2 ]
De Cooman, Bruno Charles [1 ]
机构：
[1] Pohang Univ Sci & Technol, Mat Design Lab, Grad Inst Ferrous Technol, Pohang 790784, South Korea
[2] Devi Ahilya Univ, Sch Phys, Indore 452017, Madhya Pradesh, India
来源：
ACTA MATERIALIA | 2011年 / 59卷 / 17期
基金：
新加坡国家研究基金会;
关键词：
Dynamic strain aging; Point defect complexes; C-Mn reorientation; Internal friction; HADFIELD MANGANESE STEEL; IRON-CARBON MARTENSITE; INTERNAL-FRICTION; SOLID-SOLUTIONS; AUSTENITIC STEELS; RATE SENSITIVITY; MOSSBAUER; ALLOYS; DEFORMATION; NITROGEN;
D O I：
10.1016/j.actamat.2011.07.040
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Room temperature dynamic strain aging (DSA) is often observed from the beginning of plastic deformation in high Mn Fe 18% Mn-0.6% C and Fe-22% Mn-0.6% C twinning-induced plasticitysteels. Although the phenomenon is in many cases very pronounced, there have up to now been no attempts to explain the phenomenon of room temperature DSA in TWIP steel containing solute C. It is proposed that DSA occurs by a single diffusive jump of the C atom of the point defect complex in the stacking fault region. DSA is only observed when the C atom reorientation time is smaller than the residence time of the stacking fault at the location of the point defect complex. The latter interaction can explain the DSA-suppressing effect of Al, which increases the stacking fault energy. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：6809 / 6819
页数：11
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