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

文献类型：期刊论文

作者Chen, Jin-Xi2,3; Chen, Yan2,3; Liu, Jun-Peng3; Liu, Tian-Wei2,3; Dai, Lan-Hong1,2,3; Liu TW(刘天威); Dai LH(戴兰宏); Chen JX(陈金玺); Chen Y(陈艳)
刊名SCRIPTA MATERIALIA
出版日期2021-07-01
卷号199页码:6
关键词Medium-entropy alloy wire Size effect Strain gradient Multiple deformation twins
ISSN号1359-6462
DOI10.1016/j.scriptamat.2021.113897
通讯作者Chen, Yan(chenyan@lnm.imech.ac.cn) ; Dai, Lan-Hong(lhdai@lnm.imech.ac.cn)
英文摘要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.
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]
WOS研究方向Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:000641970600007
资助机构National Key Research and Development Program of China ; NSFC ; Strategic Priority Research Program ; Key Research Program of Frontier Sciences ; Science Challenge Project
源URL[http://dspace.imech.ac.cn/handle/311007/86506]  
专题力学研究所_非线性力学国家重点实验室
通讯作者Chen, Yan; Dai, Lan-Hong
作者单位1.Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China
3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Jin-Xi,Chen, Yan,Liu, Jun-Peng,et al. Anomalous size effect in micron-scale CoCrNi medium-entropy alloy wire[J]. SCRIPTA MATERIALIA,2021,199:6.
APA Chen, Jin-Xi.,Chen, Yan.,Liu, Jun-Peng.,Liu, Tian-Wei.,Dai, Lan-Hong.,...&陈艳.(2021).Anomalous size effect in micron-scale CoCrNi medium-entropy alloy wire.SCRIPTA MATERIALIA,199,6.
MLA Chen, Jin-Xi,et al."Anomalous size effect in micron-scale CoCrNi medium-entropy alloy wire".SCRIPTA MATERIALIA 199(2021):6.

入库方式： OAI收割

来源：力学研究所

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