| Superior tensile properties induced by triple-level heterogeneous structures in the CoNiV-based medium-entropy alloy | |
Xu LK(徐璐珂)1,2; Ma Y(马彦)1; Zhang ZH(张子晗)1,2 ; Yang MX(杨沐鑫)1; Jiang P(姜萍)1; Zhu, Yuntian3; Wu XL(武晓雷)1,2; Yuan FP(袁福平)1,2
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| Corresponding Author | Ma, Yan([email protected]) ; Yuan, Fuping([email protected]) |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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| 2025-04-10 | |
| Volume | 214Pages:245-254 |
| ISSN | 1005-0302 |
| Abstract | The strength-ductility trade-off was evaded by deploying a triple-level heterogeneous structure into a CoNiV-based medium-entropy alloy (THS MEA). The innovative hetero-structures comprise chemical short-range ordering (CSRO) at the atomic level, B2 precipitates at the nanoscale level, and heterogeneous grains at the microscale level. The THS MEA exhibits superior mechanical properties, displaying a yield strength from 1.1 GPa to 1.5 GPa alongside a uniform elongation of 18 %-35 %. Compared with its coarse-grained (CG) counterpart, the THS MEA demonstrates the pronounced up-turn phenomenon and enhanced hardening behavior attributed to hetero-deformation-induced (HDI) hardening. The detailed microstructural characterizations reveal that CG MEA primarily accommodates deformation through extensive planar dislocations and Taylor lattices. However, the THS MEA exhibits a more complex deformation profile, characterized by planar and waved dislocations, deformation twins, stacking faults, and Lomer-Cottrell locks. Additionally, the interactions between dislocations and B2 nanoprecipitates play a pivotal role in dislocation entanglements and accumulations. Furthermore, the CSRO within the matrix effectively retards the dislocation motion, contributing to a substantive hardening effect. These findings underscore the potential of a heterogeneous microstructure strategy in enhancing strain hardening for conquering the strength-ductility dilemma. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| Keyword | Medium-entropy alloy Hetero-structures Precipitation hardening Hetero-deformation-induced hardening Chemical short-range ordering |
| DOI | 10.1016/j.jmst.2024.07.020 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001301566800001 |
| WOS Keyword | STRAIN-GRADIENT PLASTICITY ; SHORT-RANGE ORDER ; MECHANICAL-PROPERTIES ; ENHANCED STRENGTH ; DEFORMATION ; DUCTILITY ; CRCONI ; IMPROVEMENT ; ORIGIN |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Funding Project | NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102] ; National Key R&D Program of China[2019YFA0209902] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0510301] ; National Natural Science Foundation of China[52192591] ; National Natural Science Foundation of China[52071326] ; Hong Kong Research Grants Council[GRF 11214121] ; Hong Kong Institute for Advanced Study |
| Funding Organization | NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; National Key R&D Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; Hong Kong Research Grants Council ; Hong Kong Institute for Advanced Study |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Ma, Yan ; Yuan, Fuping |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/96458 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 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 100049, Peoples R China; 3.City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China |
| Recommended Citation GB/T 7714 | Xu LK,Ma Y,Zhang ZH,et al. Superior tensile properties induced by triple-level heterogeneous structures in the CoNiV-based medium-entropy alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2025,214:245-254.Rp_Au:Ma, Yan, Yuan, Fuping |
| APA | 徐璐珂.,马彦.,张子晗.,杨沐鑫.,姜萍.,...&袁福平.(2025).Superior tensile properties induced by triple-level heterogeneous structures in the CoNiV-based medium-entropy alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,214,245-254. |
| MLA | 徐璐珂,et al."Superior tensile properties induced by triple-level heterogeneous structures in the CoNiV-based medium-entropy alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 214(2025):245-254. |
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