Temperature dependence of the flow stress of Fe-18Mn-0.6C-xA1 twinning-induced plasticity steel

被引：145

作者：

Jung, Il-Chan ^{[1
]}

De Cooman, Bruno C. ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Grad Inst Ferrous Technol, Mat Design Lab, Pohang 790784, South Korea

来源：

ACTA MATERIALIA | 2013年 / 61卷 / 18期

基金：

新加坡国家研究基金会;

关键词：

Thermally activated dislocation glide; Solid solution hardening; Dynamic Hall-Petch effect; Dynamic strain aging; TWIP steel; STACKING-FAULT ENERGY; AL-C ALLOYS; FE-MN-C; TENSILE PROPERTIES; TWIP STEELS; DEFORMATION; BEHAVIOR; EVOLUTION; KINETICS; PHYSICS;

D O I：

10.1016/j.actamat.2013.07.042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The tensile properties of Fe-18Mn-0.6C with Al-alloying additions of 0, 1.5 and 2.5 wt.% were investigated in the temperature range from 213 K (-60 degrees C) to 413 K (140 degrees C). The addition of Al resulted in an increase of the yield strength due to solid solution hardening and a decrease of the work hardening due to the suppression of deformation twinning. Both the decrease of the deformation temperature and the addition of Al suppressed the dynamic strain aging, clearly indicating an interaction between the stacking fault region of the mobile dislocation and Mn C point defect complexes. A constitutive model for the temperature dependence of the flow stress, taking into account the thermally activated dislocation glide, Al solid solution hardening and the dynamic Hall-Petch effect caused by deformation twinning, was developed. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：6724 / 6735

页数：12

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