| Enhanced strength-ductility synergy in a gradient hetero-structured CrCoNi medium-entropy alloy | |
Feng HQ(冯航旗)1,2; Zhang HZ(张杭州)2,3 ; He ZH(何政鸿)2,3; Zhou LL(周玲玲)2,3; Zhang ZH(张子晗)2,3; Yang MX(杨沐鑫)2,3; Li,Weijie4; Wu XL(武晓雷)2,3; Yuan FP(袁福平)2,3; Li,Ying4
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| Corresponding Author | Yang, Muxin([email protected]) ; Li, Ying([email protected]) |
| Source Publication | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
 |
| 2024-11-01 | |
| Volume | 33Pages:7491-7502 |
| ISSN | 2238-7854 |
| Abstract | A CrCoNi medium-entropy alloy (MEA) with gradient hetero-structure (GHS) composing of gradient nanostructured surface layer and hetero-structured matrix was prepared via a two-step process: pre-cold rolling (CR) deformation and subsequent annealing followed by surface mechanical grinding treatment (SMGT) and secondary annealing. The GHS CrCoNi exhibits an excellent synergy of strength and ductility, as evidenced by a yield strength of approximately 1.2 GPa and a uniform elongation of about 20%. The GHS displays a pronounced hetero-deformation induced (HDI) hardening effect, whereby the central layer (CL) and surface layer (SL) undergo local strain hardening in a mutually compatible manner. This process facilitates the multiplication and accumulation of geometrically necessary dislocations (GNDs) at intra- and inter-layer hetero-interfaces and also activates the deformation faulting and twinning in both CL and SL, thus enhancing the overall mechanical response. The interlayer compatible deformation observed in the GHS significantly bolsters the sustainability of strain hardening at the microscopic scale. This effect is of significant importance in redistributing stress and strain more rationally across the entire GHS sample, effectively reducing the risk of localized deformation failures. This study offers insight into the correlation between macroscopic strain hardening and micromechanical behavior in gradient-/hetero-structured materials. |
| Keyword | Gradient nanostructures Hetero-structures Strain hardening Strength-ductility synergy Medium-entropy alloys |
| DOI | 10.1016/j.jmrt.2024.11.068 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001360048700001 |
| WOS Keyword | SHORT-RANGE ORDER ; SURFACE-LAYER ; MECHANICAL-PROPERTIES ; DEFORMATION ; PLASTICITY ; IMPACT ; STRESS |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Funding Project | National Key R&D Program of China[2019YFA0209902] ; Natural Science Foundation of China[52225108] ; Natural Science Foundation of China[52071326] ; Natural Science Foundation of China[52171290] ; Natural Science Foundation of China[52192593] ; Natural Science Foundation of China[51601204] ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503] |
| Funding Organization | National Key R&D Program of China ; Natural Science Foundation of China ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; Strategic Priority Research Program of the Chinese Academy of Sciences |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Yang, Muxin ; Li, Ying |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/97505 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Wuhan Univ Technol, Sch Naval Architecture Ocean & Energy Power Engn, 1178 Heping Rd, Wuhan 430070, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China; 4.Beijing Inst Technol, State Key Lab Explos Sci & Technol, 5 Zhongguancun South St, Beijing 100081, Peoples R China |
| Recommended Citation GB/T 7714 | Feng HQ,Zhang HZ,He ZH,et al. Enhanced strength-ductility synergy in a gradient hetero-structured CrCoNi medium-entropy alloy[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,33:7491-7502.Rp_Au:Yang, Muxin, Li, Ying |
| APA | 冯航旗.,张杭州.,何政鸿.,周玲玲.,张子晗.,...&Li,Ying.(2024).Enhanced strength-ductility synergy in a gradient hetero-structured CrCoNi medium-entropy alloy.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,33,7491-7502. |
| MLA | 冯航旗,et al."Enhanced strength-ductility synergy in a gradient hetero-structured CrCoNi medium-entropy alloy".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 33(2024):7491-7502. |
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