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Superior tensile properties induced by triple-level heterogeneous structures in the CoNiV-based medium-entropy alloy

文献类型：期刊论文

作者Xu, Luke2,3; Ma, Yan3; Zhang, Zihan2,3; Yang, Muxin3; Jiang, Ping3; Zhu, Yuntian1; Wu, Xiaolei2,3; Yuan, Fuping2,3; Jiang P(姜萍); Wu XL(武晓雷)
刊名JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
出版日期2025-04-10
卷号214页码:245-254
关键词Medium-entropy alloy Hetero-structures Precipitation hardening Hetero-deformation-induced hardening Chemical short-range ordering
ISSN号1005-0302
DOI10.1016/j.jmst.2024.07.020
通讯作者Ma, Yan(mayan@imech.ac.cn) ; Yuan, Fuping(fpyuan@lnm.imech.ac.cn)
英文摘要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.
WOS关键词STRAIN-GRADIENT PLASTICITY ; SHORT-RANGE ORDER ; MECHANICAL-PROPERTIES ; ENHANCED STRENGTH ; DEFORMATION ; DUCTILITY ; CRCONI ; IMPROVEMENT ; ORIGIN
资助项目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
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001301566800001
资助机构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
源URL[http://dspace.imech.ac.cn/handle/311007/96457]  
专题力学研究所_非线性力学国家重点实验室
通讯作者Ma, Yan; Yuan, Fuping
作者单位1.City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, 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		 Xu, Luke,Ma, Yan,Zhang, Zihan,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.
APA Xu, Luke.,Ma, Yan.,Zhang, Zihan.,Yang, Muxin.,Jiang, Ping.,...&张子晗.(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 Xu, Luke,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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来源：力学研究所

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