The role of interstitial carbon atoms on the strain-hardening rate of twinning-induced plasticity steels

被引：55
|
作者：
Luo, Z. C. [1 ,2 ]
Huang, M. X. [1 ]
机构：
[1] Univ Hong Kong, Dept Mech Engn, Pokfulam Rd, Hong Kong, Peoples R China
[2] Guangdong Acad Sci, Guangdong Inst Mat & Proc, Guangzhou, Peoples R China
来源：
SCRIPTA MATERIALIA | 2020年 / 178卷
基金：
中国国家自然科学基金;
关键词：
TWIP steel; Strain-hardening; Dislocation density; Carbon-dislocation interaction; Synchrotron X-ray diffraction; STACKING-FAULT ENERGY; TENSILE DEFORMATION-BEHAVIOR; MANGANESE AUSTENITIC STEEL; MECHANICAL-PROPERTIES; TWIP STEEL; EVOLUTION; DISLOCATIONS; ORIGIN; MODEL; GRAIN;
D O I：
10.1016/j.scriptamat.2019.11.047
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Synchrotron X-ray diffraction was applied to measure the dislocation density of two twinning-induced plasticity (TWIP) steels with different carbon content but comparable stacking fault energy (SFE). We found that the dislocation density of the carbon-alloyed TWIP is much higher than that of the carbon-free TWIP steel, though these two steels possess similar twin volume fraction. It indicates that the excellent tensile and strain-hardening properties of the carbon-alloyed TWIP steels are mainly caused by the high dislocation density induced by the carbon-dislocation interaction. Carbon-free TWIP steels are conventional low SFE fcc alloys similar to 316L stainless steel. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：264 / 268
页数：5
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