Anomalous size effect in micron-scale CoCrNi medium-entropy alloy wire

doi:10.1016/j.scriptamat.2021.113897

IMECH-IR > 非线性力学国家重点实验室

	Anomalous size effect in micron-scale CoCrNi medium-entropy alloy wire
	Chen JX(陈金玺)1,2 ; Chen Y(陈艳)1,2 ; Liu JP(刘俊鹏)1; Liu TW(刘天威)1,2 ; Dai LH(戴兰宏)1,2,3
通讯作者	Chen, Yan(chenyan@lnm.imech.ac.cn) ; Dai, Lan-Hong(lhdai@lnm.imech.ac.cn)
发表期刊	SCRIPTA MATERIALIA
	2021-07-01
卷号	199 页码:6
ISSN	1359-6462
摘要	Micron-sized CoCrNi medium-entropy alloy (MEA) wires are successfully fabricated by Taylor-Ulitovsky method for the first time. The wires of two different sizes, with diameters of 40 and 100 microns, ex-hibit an excellent combination of tensile strength and ductility. In-depth microstructure characterization indicates the superior mechanical properties stem from the synergy of Lomer-Cottrell locks, mechani-cal nano-twinning and HCP stacking. Surprisingly, an anomalous size effect is presented in the tension of these microwires, i.e., the much higher tension strength and ductility are observed in the 40 micron-wire, in sharp contrast to conventional single-principal element alloys only showing negligibly minor tension size effect. Much higher density of geometrically necessary dislocation accompanying heterogeneous de-formation is observed in 40 micron-wire, leading to a high strain gradient, which is in turn joined with multiple deformation twins giving rise to high strength and ductility in 40 micron-wire. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Medium-entropy alloy wire Size effect Strain gradient Multiple deformation twins
DOI	10.1016/j.scriptamat.2021.113897
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000641970600007
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 Research and Development Program of China[2017YFB0702003] ; NSFC[11790292] ; NSFC[11972346] ; NSFC[51901235] ; NSFC[11988102] ; Strategic Priority Research Program[XDB22040302] ; Strategic Priority Research Program[XDB22040303] ; Key Research Program of Frontier Sciences[QYZDJSSW-JSC011] ; Science Challenge Project[TZ2018001]
项目资助者	National Key Research and Development Program of China ; NSFC ; Strategic Priority Research Program ; Key Research Program of Frontier Sciences ; Science Challenge Project
论文分区	一类
力学所作者排名	1
RpAuthor	Chen, Yan ; Dai, Lan-Hong
引用统计	被引频次：19[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/311007/86507
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, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China; 3.Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Chen JX,Chen Y,Liu JP,et al. Anomalous size effect in micron-scale CoCrNi medium-entropy alloy wire[J]. SCRIPTA MATERIALIA,2021,199:6.
APA	陈金玺,陈艳,刘俊鹏,刘天威,&戴兰宏.(2021).Anomalous size effect in micron-scale CoCrNi medium-entropy alloy wire.SCRIPTA MATERIALIA,199,6.
MLA	陈金玺,et al."Anomalous size effect in micron-scale CoCrNi medium-entropy alloy wire".SCRIPTA MATERIALIA 199(2021):6.

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