Dislocation plasticity reigns in a traditional twinning-induced plasticity steel by in situ observation

doi:10.1016/j.mtnano.2018.11.004

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Dislocation plasticity reigns in a traditional twinning-induced plasticity steel by in situ observation
	Fu, X.; Wu XL(武晓雷); Yu, Q.
刊名	MATERIALS TODAY NANO
	2018-08
卷号	3 页码:48-53
关键词	Deformation twinning Plasticity Dislocation TWIP steel Microstructure
ISSN号	2588-8420
DOI	10.1016/j.mtnano.2018.11.004
英文摘要	To twin or not to twin? The critical doubt emerges recently on the dominant role of deformation twinning in contributing to strain hardening and plasticity, which has been long taken for granted specifically in twinning-induced plasticity (TWIP) steels. Here, the dynamic deformation process was in situ studied in a typical Fe-30Mn-3Si-3Al (wt. %) TWIP steel by using transmission electron microscopy. It is found that dislocation activities, instead of twinning, reigns over the whole plastic process, including planar slips and especially cross-slips of dislocations, leading to strong interaction of dislocations. An unexpected generation of nanograins is visible because of dislocation activities ahead of the crack tip. Moreover, the dominant dislocation plasticity continues straight down to cryogenic temperatures. The present results evidence the key role of forest dislocation hardening and shed insights into deformation physics in TWIP steels, contrary to our conventional understanding. (c) 2018 The Authors. Published by Elsevier Ltd.
学科主题	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
分类号	二类/Q1
语种	英语
WOS记录号	WOS:000603553000004
资助机构	Chinese 1000Youth-Talent Plan ; 111 project [B16042] ; National Natural Science Foundation of China [51671168, 11572328, 11790293] ; State Key Program for Basic Research in China [2015CB65930] ; National Key R&D Program of China [2017YFA0204402] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040503]
其他责任者	Yu, Q (corresponding author), Zhejiang Univ, Ctr Electron Microscopy, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China. ; Yu, Q (corresponding author), Zhejiang Univ, State Key Lab Silicon Mat, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/90236]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.[Wu, X.] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.[Wu, X.] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 3.Yu, Q.] Zhejiang Univ, State Key Lab Silicon Mat, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China 4.Yu, Q.] Zhejiang Univ, Ctr Electron Microscopy, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China 5.[Fu, X.
推荐引用方式 GB/T 7714	Fu, X.,Wu XL,Yu, Q.. Dislocation plasticity reigns in a traditional twinning-induced plasticity steel by in situ observation[J]. MATERIALS TODAY NANO,2018,3:48-53.
APA	Fu, X.,武晓雷,&Yu, Q..(2018).Dislocation plasticity reigns in a traditional twinning-induced plasticity steel by in situ observation.MATERIALS TODAY NANO,3,48-53.
MLA	Fu, X.,et al."Dislocation plasticity reigns in a traditional twinning-induced plasticity steel by in situ observation".MATERIALS TODAY NANO 3(2018):48-53.