Evading the strength- ductility trade-off dilemma in steel through gradient hierarchical nanotwins

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	Evading the strength- ductility trade-off dilemma in steel through gradient hierarchical nanotwins
	Wei YJ(魏宇杰); Li YQ(李永强); Zhu LC(祝连春); Liu Y(刘垚); Lei XQ(雷现奇); Wang G; Wu YX; Mi ZL; Liu JB; Wang HT
刊名	NATURE COMMUNICATIONS
	2014-04
通讯作者邮箱	yujie_wei@lnm.imech.ac.cn; huajian_gao@brown.edu
卷号	5 页码:3580
ISSN号	2041-1723
通讯作者	Wei, YJ (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
产权排序	[Wei, Yujie; Li, Yongqiang; Zhu, Lianchun; Liu, Yao; Lei, Xianqi] Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; [Wang, Gang] Shanghai Univ, Lab Microstruct, Shanghai 200444, Peoples R China; [Wu, Yanxin; Mi, Zhenli] Univ Sci & Technol Beijing, Natl Engn Res Ctr Adv Rolling Technol, Beijing 100083, Peoples R China; [Liu, Jiabin; Wang, Hongtao] Zhejiang Univ, Inst Appl Mech, Hangzhou 310027, Zhejiang, Peoples R China; [Gao, Huajian] Brown Univ, Sch Engn, Providence, RI 02912 USA
合作状况	国内
中文摘要	The strength-ductility trade-off has been a long-standing dilemma in materials science. This has limited the potential of many structural materials, steels in particular. Here we report a way of enhancing the strength of twinning-induced plasticity steel at no ductility trade-off. After applying torsion to cylindrical twinning-induced plasticity steel samples to generate a gradient nanotwinned structure along the radial direction, we find that the yielding strength of the material can be doubled at no reduction in ductility. It is shown that this evasion of strength-ductility trade-off is due to the formation of a gradient hierarchical nanotwinned structure during pre-torsion and subsequent tensile deformation. A series of finite element simulations based on crystal plasticity are performed to understand why the gradient twin structure can cause strengthening and ductility retention, and how sequential torsion and tension lead to the observed hierarchical nanotwinned structure through activation of different twinning systems.
学科主题	Science & Technology - Other Topics
分类号	一类
收录类别	SCI
资助信息	Y.Wei acknowledges the support from MOST 973 of China (2012CB937500), Chinese Academy of Sciences, and National Natural Science Foundation of China (NSFC)(11021262, 11272327). G. W. thanks the supports from Shanghai Pujiang Program (no.11PJ1403900) and the Eastern Scholar Program at Shanghai Institutions of Higher Learning. Z. M. thanks the support from MOST 863 of China (2012AA03A508). H. W. and J. L. acknowledge the supports from NSFC (11002124, 11202183). H. G. acknowledges financial support from the National Science Foundation through grant CMMI-1161749 and the Center for Mechanics and Materials at Tsinghua University. We also thank Zhiwei Ma for assistance to EBSD observations.
原文出处	http://dx.doi.org/10.1038/ncomms4580
语种	英语
WOS记录号	WOS:000335220300016
公开日期	2014-06-05
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/48831]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Wei YJ,Li YQ,Zhu LC,et al. Evading the strength- ductility trade-off dilemma in steel through gradient hierarchical nanotwins[J]. NATURE COMMUNICATIONS,2014,5:3580.
APA	魏宇杰.,李永强.,祝连春.,刘垚.,雷现奇.,...&Gao HJ.(2014).Evading the strength- ductility trade-off dilemma in steel through gradient hierarchical nanotwins.NATURE COMMUNICATIONS,5,3580.
MLA	魏宇杰,et al."Evading the strength- ductility trade-off dilemma in steel through gradient hierarchical nanotwins".NATURE COMMUNICATIONS 5(2014):3580.