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Unveiling the deformation micro-mechanism for mechanical anisotropy of a CoCrFeNi medium entropy alloy

文献类型：期刊论文

作者Zhang, Qiang2; Rui SS(芮少石)1; Ma, Xianfeng2; Song, Ligang2; Zhu, Fei2; Pei, Yaowu2; Wu, Jiaxin2
刊名INTERNATIONAL JOURNAL OF PLASTICITY
出版日期2024-09-01
卷号180页码:22
关键词High-entropy alloy Strain hardening Orientaion effect
ISSN号0749-6419
DOI10.1016/j.ijplas.2024.104051
通讯作者Ma, Xianfeng(maxf6@mail.sysu.edu.cn) ; Zhu, Fei(zhuf56@mail.sysu.edu.cn)
英文摘要The equiatomic Cr-Co-Fe-Ni medium-entropy alloy has the face-centered cubic structure. Single crystals of this alloy were tested by in-situ micropillar compression along different loading axes under scanning electron microscope. The transmission electron microscopy characterization and molecular dynamics simulation were incorporated for quantitative analysis of the effects of different crystal orientations on the deformation mechanisms. The <001>-oriented pillar not only exhibited extensive deformation-induced nano twinning, but also has been identified for the first time to undergo the FCC-HCP phase transformation at room temperature. The strain localization tendency of <011>-oriented samples was confirmed through uniaxial tests to interpret the significant serration on stress-strain curves. The prominent strain hardening of <111>-oriented pillars was attributed to intense intersection between slip planes as evidenced by the extra density of Lomer-Cottrell locks. Such a high hardening rate has caused subsequent kinking of pillars. Functional division of different regions of kink band was conducted based on Orowan model. In principle, multi-principal element alloys can theoretically be designed and developed to combine a variety of excellent properties, which is an important class of candidate structural materials for advanced engineering systems. These findings provide promising guidance for understanding the mechanical anisotropy and application of these alloys.
分类号一类
WOS关键词STACKING-FAULT ENERGIES ; PLASTIC-DEFORMATION ; STRENGTH ; STRESS ; DISLOCATIONS ; ORIENTATION ; NUCLEATION ; DEPENDENCE ; STEELS ; SIZE
资助项目National Natural Science Foundation of China[U2032143] ; National Natural Science Foundation of China[12305325] ; National Natural Science Foundation of China[12205392] ; Guangdong Provincial Major Youth Talents Project[2021TQ06L123] ; Guangdong Basic and Applied Basic Research[2022A1515110802] ; Guangdong Basic and Applied Basic Research[2023A1515011596] ; Guangdong Provincial International Sci & Tech Cooperation Program[2020A0505020005] ; Guangdong Provincial International Sci & Tech Cooperation Program[STRFML-2018-25] ; Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China ; Zhuhai-Hong Kong-Macao Science and Technology Cooperation Pro-gram of Zhuhai City, China[ZH2207-7301-210009-P-WC] ; Sinoma Institute of Materials Research (Guang Zhou) Co., Ltd (SIMR)
WOS研究方向Engineering ; Materials Science ; Mechanics
语种英语
WOS记录号WOS:001270269600001
资助机构National Natural Science Foundation of China ; Guangdong Provincial Major Youth Talents Project ; Guangdong Basic and Applied Basic Research ; Guangdong Provincial International Sci & Tech Cooperation Program ; Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China ; Zhuhai-Hong Kong-Macao Science and Technology Cooperation Pro-gram of Zhuhai City, China ; Sinoma Institute of Materials Research (Guang Zhou) Co., Ltd (SIMR)
其他责任者Ma, Xianfeng ; Zhu, Fei
源URL[http://dspace.imech.ac.cn/handle/311007/96038]  
专题力学研究所_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 LNM, Beijing 100190, Peoples R China
2.Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Guangdong, Peoples R China;
推荐引用方式
GB/T 7714		 Zhang, Qiang,Rui SS,Ma, Xianfeng,et al. Unveiling the deformation micro-mechanism for mechanical anisotropy of a CoCrFeNi medium entropy alloy[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2024,180:22.
APA Zhang, Qiang.,芮少石.,Ma, Xianfeng.,Song, Ligang.,Zhu, Fei.,...&Wu, Jiaxin.(2024).Unveiling the deformation micro-mechanism for mechanical anisotropy of a CoCrFeNi medium entropy alloy.INTERNATIONAL JOURNAL OF PLASTICITY,180,22.
MLA Zhang, Qiang,et al."Unveiling the deformation micro-mechanism for mechanical anisotropy of a CoCrFeNi medium entropy alloy".INTERNATIONAL JOURNAL OF PLASTICITY 180(2024):22.

入库方式： OAI收割

来源：力学研究所

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