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Title: Evading the strength- ductility trade-off dilemma in steel through gradient hierarchical nanotwins
Author: 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; Gao HJ
Source: NATURE COMMUNICATIONS
Issued Date: 2014-04
Volume: 5, Pages:3580
Abstract: 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.
Language: 英语
Indexed Type: SCI
Corresponding Author: Wei, YJ (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Correspondent Email: yujie_wei@lnm.imech.ac.cn; huajian_gao@brown.edu
Related URLs: 查看原文
WOS ID: WOS:000335220300016
ISSN: 2041-1723
Rank: [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
Subject: Science & Technology - Other Topics
Department: LNM微结构计算力学(筹)
Classification: 一类
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/48831
Appears in Collections:非线性力学国家重点实验室_期刊论文

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Recommended Citation:
魏宇杰; 李永强; 祝连春; 刘垚; 雷现奇; Wang G; Wu YX; Mi ZL; Liu JB; Wang HT; Gao HJ.Evading the strength- ductility trade-off dilemma in steel through gradient hierarchical nanotwins,NATURE COMMUNICATIONS,2014,5():3580
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