Strain rate effects on tensile deformation behaviors for Fe-22Mn-0.6C-(1.5Al) twinning-induced plasticity steel

IMR OpenIR

	Strain rate effects on tensile deformation behaviors for Fe-22Mn-0.6C-(1.5Al) twinning-induced plasticity steel
	H. K. Yang; Z. J. Zhang; F. Y. Dong; Q. Q. Duan; Z. F. Zhang
	2014
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	607 页码:551-558
摘要	In this study, the effect of strain rate on the tensile deformation behavior of Fe-22Mn-0.6C-(1.5Al) (wt%) twinning-induced plasticity (TWIP) steel was investigated. The experimental results indicated that the work hardening exponent (n), ultimate tensile strength (sigma(u)) and the uniform elongation (delta(u)) decreased with increasing strain rates (from 10(-4) to 10(0) s(-1)). This phenomenon exhibited negative strain rate sensitivity (NSRS), and the strain rate sensitivity value (m) was observed to be higher in the aluminum added FeMnC TWIP steel. In order to gain an in-depth understanding of this sensitivity and the subsequent effect of aluminum, the present research focused on the deformation twins and conducted comparative studies on their influence in terms of fractions (F), thickness (t) and spacing (s). Additionally, a twin boundary affected zone (TBAZ) model was proposed, where the relation between higher strain rates were directly applicable to the reduction of interfaces between the matrix and deformation twins. These result indicated that fewer sessile dislocations could be accommodated at high strain rates, thus weakening the work hardening ability. Finally, model calculations were performed to validate the findings, where TBAZ region fractions in FeMnC-Al were observed to be higher than that in FeMnC, corresponding to the increased strain rate sensitivity. (C) 2014 Elsevier B.V. All rights reserved.
部门归属	[yang, h. k. ; zhang, z. j. ; dong, f. y. ; duan, q. q. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; zhang, zf (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china. ; zhfzhang@imr.ac.cn
关键词	Twip Steel Strain Rate Deformation Twinning Strength Negative Strain Rate Sensitivity (Nsrs) Stacking-fault Energy Manganese Austenitic Steel c Twip Steel Assisted Multiphase Steels Fcc Copper-alloys Rate Sensitivity Microstructure Evolution Trip/twip Steels Grain-size Multiscale Mechanics
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73466
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. K. Yang,Z. J. Zhang,F. Y. Dong,et al. Strain rate effects on tensile deformation behaviors for Fe-22Mn-0.6C-(1.5Al) twinning-induced plasticity steel[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2014,607:551-558.
APA	H. K. Yang,Z. J. Zhang,F. Y. Dong,Q. Q. Duan,&Z. F. Zhang.(2014).Strain rate effects on tensile deformation behaviors for Fe-22Mn-0.6C-(1.5Al) twinning-induced plasticity steel.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,607,551-558.
MLA	H. K. Yang,et al."Strain rate effects on tensile deformation behaviors for Fe-22Mn-0.6C-(1.5Al) twinning-induced plasticity steel".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 607(2014):551-558.