| Unveiling the deformation micro-mechanism for mechanical anisotropy of a CoCrFeNi medium entropy alloy | |
| Zhang, Qiang1; Rui SS(芮少石)2; Ma, Xianfeng1; Song, Ligang1; Zhu, Fei1; Pei, Yaowu1; Wu, Jiaxin1 | |
| Corresponding Author | Ma, Xianfeng([email protected]) ; Zhu, Fei([email protected]) |
| Source Publication | INTERNATIONAL JOURNAL OF PLASTICITY
 |
| 2024-09-01 | |
| Volume | 180Pages:22 |
| ISSN | 0749-6419 |
| Abstract | 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. |
| Keyword | High-entropy alloy Strain hardening Orientaion effect |
| DOI | 10.1016/j.ijplas.2024.104051 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001270269600001 |
| WOS Keyword | STACKING-FAULT ENERGIES ; PLASTIC-DEFORMATION ; STRENGTH ; STRESS ; DISLOCATIONS ; ORIENTATION ; NUCLEATION ; DEPENDENCE ; STEELS ; SIZE |
| WOS Research Area | Engineering ; Materials Science ; Mechanics |
| WOS Subject | Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics |
| Funding Project | 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) |
| Funding Organization | 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) |
| Classification | 一类 |
| Ranking | 2 |
| Contributor | Ma, Xianfeng ; Zhu, Fei |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/96039 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Guangdong, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China |
| Recommended Citation 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.Rp_Au:Ma, Xianfeng, Zhu, Fei |
| 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. |
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