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Investigation on the incipient plasticity of (001)-oriented CoCrFeNi micropillar

文献类型：期刊论文

作者Zhang, Qiang2; Rui SS(芮少石)1; Song, Ligang2; Pei, Yaowu2; Zhu, Fei2; Ma, Xianfeng2
刊名SCRIPTA MATERIALIA
出版日期2024-11-01
卷号252页码:6
关键词Single cyrstal Micro-pillar compression Incipient plasticity In -situ test
ISSN号1359-6462
DOI10.1016/j.scriptamat.2024.116250
通讯作者Zhu, Fei(zhuf56@mail.sysu.edu.cn) ; Ma, Xianfeng(maxf6@mail.sysu.edu.cn)
英文摘要Micro-level mechanical tests are of extreme sensitivity to the initial internal state and early response of materials. The stability of elastic property and yield behavior of macro-level polycrystal specimens fade significantly under micro-level uniaxial loading state. In this study, the incipient plasticity and underlying mechanisms of mediumentropy alloy CoCrFeNi were investigated by in-situ micropillar compression. Stress fluctuations at elastic stage of (001)-oriented pillar were observed in the stress-strain curves and then evidenced by TEM characterization as the activation of leading partial dislocations. The discreteness of yield strength was thus attributed to the impediment of pre-formed stacking faults. Furthermore, a model illustrating the incipient plasticity and its consequences on micropillar compression tests was proposed after an evaluation on twinning stress of alloys with low stacking fault energy.
分类号一类
WOS关键词HIGH-ENTROPY ALLOY ; MECHANICAL-PROPERTIES ; DEFORMATION ; STRESS ; SIZE ; MICROSTRUCTURE ; NUCLEATION ; DEPENDENCE ; STRENGTH
资助项目Guangdong Major Project of Basic and Applied Basic Research[2019B030302011] ; National Natural Science Foundation of China[U2032143] ; National Natural Science Foundation of China[12305325] ; Guangdong Basic and Applied Basic Research[2022A1515110802] ; Guangdong Basic and Applied Basic Research[2023A1515011596] ; Guangdong Provincial International Sci & Tech Cooperation Program[2020A0505020005] ; Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China ; Zhuhai-Hong Kong -Macao Science and Technology Cooperation Program of Zhuhai City, China[ZH2207 - 7301-210009-P-WC] ; Sinoma Institute of Materials Research (Guang Zhou) Co., Ltd (SIMR)
WOS研究方向Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001262598900001
资助机构Guangdong Major Project of Basic and Applied Basic Research ; National Natural Science Foundation of China ; 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 Program of Zhuhai City, China ; Sinoma Institute of Materials Research (Guang Zhou) Co., Ltd (SIMR)
其他责任者Zhu, Fei ; Ma, Xianfeng
源URL[http://dspace.imech.ac.cn/handle/311007/95894]  
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,Song, Ligang,et al. Investigation on the incipient plasticity of (001)-oriented CoCrFeNi micropillar[J]. SCRIPTA MATERIALIA,2024,252:6.
APA Zhang, Qiang,芮少石,Song, Ligang,Pei, Yaowu,Zhu, Fei,&Ma, Xianfeng.(2024).Investigation on the incipient plasticity of (001)-oriented CoCrFeNi micropillar.SCRIPTA MATERIALIA,252,6.
MLA Zhang, Qiang,et al."Investigation on the incipient plasticity of (001)-oriented CoCrFeNi micropillar".SCRIPTA MATERIALIA 252(2024):6.

入库方式： OAI收割

来源：力学研究所

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