| Phase transition and heterogeneous strengthening mechanism in CoCrFeNiMn high-entropy alloy fabricated by laser-engineered net shaping via annealing at intermediate-temperature | |
Bai YJ(白云建)1,3 ; Jiang H(姜恒)1,3; Yan, Kuo1; Li, Maohui5; Wei YP(魏延鹏)2,3; Zhang K(张坤)1,3; Wei BC(魏炳忱)1,3,4
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| Corresponding Author | Zhang, Kun([email protected]) ; Wei, Bingchen([email protected]) |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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| 2021-11-30 | |
| Volume | 92Pages:129-137 |
| ISSN | 1005-0302 |
| Abstract | High-entropy alloys (HEAs) have attracted tremendous attention owing to their controllable mechanical properties, whereas additive manufacturing (AM) is an efficient and flexible processing route for novel materials design. However, a profound appraisal of the fundamental material physics behind the strengthening of AM-printed HEAs upon low/intermediate-temperature annealing is essential. In this work, CoCrFeNiMn HEAs have been prepared using laser-engineered net shaping (LENS) and subsequently annealed at different temperatures. The CoCrFeNiMn HEA annealed at intermediate-temperature (873 K) exhibits a strong strain hardening capability, resulting in ultimate strength of 725 MPa and plasticity of 22%. A ternary heterogeneous strengthening mechanism is proposed to explain this phenomenon, in which equiaxed grains, columnar grains, and sigma precipitates play different roles during tensile deformation. The resultant excellent strength and ductility can be ascribed to the heterostructure-induced mismatch. The equiaxed grains provide adequate grain boundaries (GBs), which induce dislocation plugging-up and entanglement; the columnar grains induce the onset and arrest of the dislocations for plastic deformation; and the sigma precipitates hinder the movement of slip dislocations. The results provide new insights into overcoming the strength-ductility trade-off of LENS-printed HEAs with complex geometries. (C) 2021 Published by Elsevier Ltd on behalf of Chinese Society for Metals. |
| Keyword | High-entropy alloys Phase transition Heterogeneous strengthening Intermediate-temperature |
| DOI | 10.1016/j.jmst.2021.03.028 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000718812700003 |
| WOS Keyword | STAINLESS-STEEL ; TENSILE PROPERTIES ; ENHANCED STRENGTH ; RESIDUAL-STRESS ; MICROSTRUCTURE ; DEFORMATION ; PARAMETERS ; COMPOSITES ; EVOLUTION ; DUCTILITY |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Funding Project | National Natural Science Foundation of China[51401028] ; National Natural Science Foundation of China[51271193] ; National Natural Science Foundation of China[11402277] ; National Natural Science Foundation of China[11790292] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040303] ; Innovation Program[237099000000170004] |
| Funding Organization | National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Innovation Program |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Zhang, Kun ; Wei, Bingchen |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/88012 |
| Collection | 微重力重点实验室 流固耦合系统力学重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Natl Micrograv Lab, Beijing 100190, Peoples R China; 2.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 4.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China; 5.Acad Mil Med Sci, Acad Syst Engn, Inst Quartermaster Engn & Technol, Beijing 100010, Peoples R China |
| Recommended Citation GB/T 7714 | Bai YJ,Jiang H,Yan, Kuo,et al. Phase transition and heterogeneous strengthening mechanism in CoCrFeNiMn high-entropy alloy fabricated by laser-engineered net shaping via annealing at intermediate-temperature[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,92:129-137.Rp_Au:Zhang, Kun, Wei, Bingchen |
| APA | 白云建.,姜恒.,Yan, Kuo.,Li, Maohui.,魏延鹏.,...&魏炳忱.(2021).Phase transition and heterogeneous strengthening mechanism in CoCrFeNiMn high-entropy alloy fabricated by laser-engineered net shaping via annealing at intermediate-temperature.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,92,129-137. |
| MLA | 白云建,et al."Phase transition and heterogeneous strengthening mechanism in CoCrFeNiMn high-entropy alloy fabricated by laser-engineered net shaping via annealing at intermediate-temperature".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 92(2021):129-137. |
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| Phase transition and（5383KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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