| Deformation induced hcp nano-lamella and its size effect on the strengthening in a CoCrNi medium-entropy alloy | |
Ma Y(马彦)1,2; Yang MX(杨沐鑫)1 ; Yuan FP(袁福平)1,2; Wu XL(武晓雷)1,2
| |
| Corresponding Author | Yuan, Fuping([email protected]) |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| 2021-08-20 | |
| Volume | 82Pages:122-134 |
| ISSN | 1005-0302 |
| Abstract | Deformation-induced hcp nano-lamellae with various widths and interspacings were observed in the CoCrNi medium-entropy alloy (MEA) under high strain rate and cryogenic temperature in the present study. Higher hardness was found in the cryogenic-deformed samples compared to the room temperature-deformed samples without hcp phase. Then, size effects of embedded hcp nano-lamellae on the tensile behaviors in the fcc CoCrNi MEA were investigated by molecular dynamics simulations. The overall strengthening was found to have two components: phase strengthening and extra interface strengthening, and the interface strengthening was observed to be always stronger than the phase strengthening. Both overall strengthening and interface strengthening were found to increase with increasing width and decreasing interspacing of embedded hcp nano-lamellae. The samples with small spaced hcp nano-lamellae are even stronger than the pure hard hcp phase due to the extra interface strengthening. The samples with larger width of embedded hcp nano-lamellae can provide stronger resistance for dislocation slip and transmission. Nanotwins were observed to be formed in the embedded hcp nano-lamellae. Higher density of phase boundaries and newly formed twin boundaries can provide more barriers for dislocation glide in the other slip systems, resulting in higher strength for samples with smaller interspacing. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| Keyword | Strengthening mechanisms Phase transformation Twinning Medium entropy alloys Molecular dynamics simulations |
| DOI | 10.1016/j.jmst.2020.12.017 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000661885200013 |
| WOS Keyword | MECHANICAL-PROPERTIES ; PHASE-TRANSFORMATION ; ATOMISTIC SIMULATIONS ; CRYOGENIC STRENGTH ; EQUIATOMIC CRCONI ; STRAIN ; DUCTILITY ; MICROSTRUCTURE ; EVOLUTION ; IMPACT |
| 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[2017YFB0202802] ; National Key R&D Program of China[2017YFA0204402] ; National Key R&D Program of China[2019YFA02099-01] ; National Key R&D Program of China[2019YFA02099-02] ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102] ; National Natural Science Foundation of China[11672313] ; National Natural Science Foundation of China[11790293] ; National Natural Science Foundation of China[52071326] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503] |
| Funding Organization | National Key R&D Program of China ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Yuan, Fuping |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/86938 |
| 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, 15 West Rd,North 4th Ring, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Ma Y,Yang MX,Yuan FP,et al. Deformation induced hcp nano-lamella and its size effect on the strengthening in a CoCrNi medium-entropy alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,82:122-134.Rp_Au:Yuan, Fuping |
| APA | 马彦,杨沐鑫,袁福平,&武晓雷.(2021).Deformation induced hcp nano-lamella and its size effect on the strengthening in a CoCrNi medium-entropy alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,82,122-134. |
| MLA | 马彦,et al."Deformation induced hcp nano-lamella and its size effect on the strengthening in a CoCrNi medium-entropy alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 82(2021):122-134. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2021F283.pdf（10900KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment