Deformation nanotwins suppress shear banding during impact test of CrCoNi medium-entropy alloy

doi:10.1016/j.scriptamat.2019.12.017

IMECH-IR > 非线性力学国家重点实验室

	Deformation nanotwins suppress shear banding during impact test of CrCoNi medium-entropy alloy
	Wu XL(武晓雷)1,2 ; Yang MX(杨沐鑫)1 ; Jiang P(姜萍)1 ; Wang C3 ; Zhou LL(周玲玲)1; Yuan FP(袁福平)1,2 ; Ma E 4
通讯作者	Wu, Xiaolei(xlwu@imech.ac.cn)
发表期刊	SCRIPTA MATERIALIA
	2020-03-01
卷号	178 页码:452-456
ISSN	1359-6462
摘要	We report deformation bands ahead of the crack tip in a CrCoNi alloy under impact loading, and analyze the effects of deformation twinning on strain localization in the form of shear banding. Due to low stacking fault energy, upon high-strain-rate deformation this medium-entropy alloy forms twins with thickness and spacing of only a few nanometers. These nano-twins are embedded dynamically not only ahead of any developing shear band to retard its advance, but also in its interior to work harden. This dual effect helps to suppress runaway shear banding instability that instigates failure and contributes to the energy absorption as recorded in instrumented Charpy tests. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Nano-twin Shear-band Strain hardening Impact toughness Medium-entropy alloy
DOI	10.1016/j.scriptamat.2019.12.017
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000510947200091
关键词[WOS]	BRITTLE TRANSITION ; STAINLESS-STEEL ; TOUGHNESS ; TEMPERATURE ; FAILURE ; DUCTILE ; ENERGY ; PROPAGATION ; BEHAVIOR ; MODES
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助项目	National Key R&D Program of China[2019YFA0200082] ; National Key R&D Program of China[2017YFA0204402] ; National Natural Science Foundation of China[11572328] ; National Natural Science Foundation of China[11672313] ; National Natural Science Foundation of China[11790293] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503] ; US-NSF-DMR[1804320]
项目资助者	National Key R&D Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; US-NSF-DMR
论文分区	一类
力学所作者排名	1
RpAuthor	Wu, Xiaolei
引用统计	被引频次：47[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/81524
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Cent Iron & Steel Res Inst, Cent Lab, 76 Xueyuan South Rd, Beijing 100081, Peoples R China; 4.Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA
推荐引用方式 GB/T 7714	Wu XL,Yang MX,Jiang P,et al. Deformation nanotwins suppress shear banding during impact test of CrCoNi medium-entropy alloy[J]. SCRIPTA MATERIALIA,2020,178:452-456.
APA	武晓雷.,杨沐鑫.,姜萍.,Wang C.,周玲玲.,...&Ma E.(2020).Deformation nanotwins suppress shear banding during impact test of CrCoNi medium-entropy alloy.SCRIPTA MATERIALIA,178,452-456.
MLA	武晓雷,et al."Deformation nanotwins suppress shear banding during impact test of CrCoNi medium-entropy alloy".SCRIPTA MATERIALIA 178(2020):452-456.

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