Unusual step-like stress flow behavior and mechanisms of a 1.3 GPa grade medium-Mn steel with 51.2 % ductility

doi:10.1016/j.matdes.2023.112380

IMR OpenIR

	Unusual step-like stress flow behavior and mechanisms of a 1.3 GPa grade medium-Mn steel with 51.2 % ductility
	Yan, Shu 1,2; Yu, Zhifu 1,2; Liang, Taosha 3; Wang, Sai 4; Li, Wendong 1,2; Tao, Xu 1,2; Liu, Xianghua 1,2,5,6
通讯作者	Yan, Shu(yanshu_neu@sina.com)
	2023-11-01
发表期刊	MATERIALS & DESIGN
ISSN	0264-1275
卷号	235 页码:11
摘要	A Fe-8.9Mn-1.59Si-1.0Al-0.25C medium-Mn steel have achieved a superior combination of strength and ductility, i.e., the product of strength and elongation (PSE) of 66.5 GPa%. Meanwhile, an unusual step-like stress-strain curve due to heterogeneous deformation bands including Luders band and multiple Portevin-Le Chatelier (PLC) bands was investigated systematacially. The repeated heterogeneous deformation is due to a combination of extrinsic and intrinsic factors. The former refers a small stress concentration near the grip ends of the tensile sample, and the latter is associated with low density of initial mobile dislocations, limited capacity of mobile dislocation multiplication and the presence of meta-stable austenite. As for meta-stable austenite, stress-assisted martensite transformation (SAMT) was confirmed experimentally, which will facilitate strain concen-tration and the starting of heterogeneous deformation. Moreover, before strain-induced martensite trans-formation (SIMT), it is the plastic deformation of austenite grains through the slip of partial dislocation and stacking faults (SFs) that contributes to a larger Luders strain. Finally, we propose that whether it is possible to make the heterogeneous deformation to be a positive side for certain working conditions, which may open new doors for the application of medium-Mn steels. We will continue to do some exploratory studies in this direction next.
关键词	Medium-Mn steel Luders band PLC band Heterogeneous deformation Austenite
资助者	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities of China ; 111 Project
DOI	10.1016/j.matdes.2023.112380
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52174358] ; Fundamental Research Funds for the Central Universities of China[N2302006] ; 111 Project[B16009]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:001106756000001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/183887
专题	中国科学院金属研究所
通讯作者	Yan, Shu
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, POB 105,11,Lane 3,Wenhua Road, Shenyang 110819, Peoples R China 2.Northeastern Univ, Key Lab Lightweight Struct Mat, Shenyang 110819, Liaoning, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 4.Zhejiang Lab, Res Inst Interdisciplinary Innovat, Hangzhou 311121, Peoples R China 5.Northeastern Univ, Natl Frontiers Sci Ctr Ind Intelligence & Syst Opt, Shenyang 110819, Peoples R China 6.Northeastern Univ, Key Lab Data Analyt & Optimizat Smart Ind, Minist Educ, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Yan, Shu,Yu, Zhifu,Liang, Taosha,et al. Unusual step-like stress flow behavior and mechanisms of a 1.3 GPa grade medium-Mn steel with 51.2 % ductility[J]. MATERIALS & DESIGN,2023,235:11.
APA	Yan, Shu.,Yu, Zhifu.,Liang, Taosha.,Wang, Sai.,Li, Wendong.,...&Liu, Xianghua.(2023).Unusual step-like stress flow behavior and mechanisms of a 1.3 GPa grade medium-Mn steel with 51.2 % ductility.MATERIALS & DESIGN,235,11.
MLA	Yan, Shu,et al."Unusual step-like stress flow behavior and mechanisms of a 1.3 GPa grade medium-Mn steel with 51.2 % ductility".MATERIALS & DESIGN 235(2023):11.