| Revisiting the role of prestrain history in the mechanical properties of ultrafine-grained CoCrFeMnNi high-entropy alloy | |
| Sun, S. J.1,2; Tian, Y. Z.3,4; Lin, H. R.1,2; Wang, Z. J.5; Zhang, Z. F.1,2 | |
| Corresponding Author | Tian, Y. Z.(tianyanzhong@mail.neu.edu.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn) |
| 2021-01-13 | |
| Source Publication | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| ISSN | 0921-5093 |
| Volume | 801Pages:10 |
| Abstract | The yield strength of face-centered cubic (FCC) alloy is always insufficient for applications. In this work, different prestrain histories were imposed to improve the yield strength and strain-hardening capability of an ultrafinegrained (UFG) CoCrFeMnNi high-entropy alloy (HEA). In contrast to the specimens prestrained at 293 K, the specimens prestrained at 77 K possess higher yield strength, elongation, and strain-hardening capability, which were intensely related to the formation of deformation twins. The cryogenic strengthening magnitude is found to be strongly associated with the grain size, but slightly affected by dislocations. By modulating the prestrain history, an ultrahigh yield strength of 1.84 GPa and a considerable uniform elongation of 13% were achieved at 77 K in the CoCrFeMnNi HEA. Hence, imposing prestrain on HEAs at 77 K could be an efficient strategy to harmonize the mechanical properties of the FCC HEAs, which would enrich the application of HEAs in cryogenic fields. |
| Keyword | High-entropy alloy Prestrain Deformation twins Cryogenic strengthening Yield strength |
| Funding Organization | Fundamental Research Funds for the Central Universities ; fund of the State Key Laboratory of Solidification Processing in NPU ; LiaoNing Revitalization Talents Program ; Chinese Academy of Sciences (CAS) ; Japan Society for the Promotion of Science (JSPS) through the Bilateral Program |
| DOI | 10.1016/j.msea.2020.140398 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Fundamental Research Funds for the Central Universities[N180204015] ; fund of the State Key Laboratory of Solidification Processing in NPU[SKLSP201922] ; LiaoNing Revitalization Talents Program[XLYC1808027] ; Chinese Academy of Sciences (CAS) ; Japan Society for the Promotion of Science (JSPS) through the Bilateral Program[GJHZ1774] |
| WOS Research Area | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000600421200002 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/158717 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Tian, Y. Z.; Zhang, Z. F. |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Northeastern Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Peoples R China 4.Northeastern Univ, Res Ctr Met Wires, Shenyang 110819, Peoples R China 5.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China |
| Recommended Citation GB/T 7714 | Sun, S. J.,Tian, Y. Z.,Lin, H. R.,et al. Revisiting the role of prestrain history in the mechanical properties of ultrafine-grained CoCrFeMnNi high-entropy alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,801:10. |
| APA | Sun, S. J.,Tian, Y. Z.,Lin, H. R.,Wang, Z. J.,&Zhang, Z. F..(2021).Revisiting the role of prestrain history in the mechanical properties of ultrafine-grained CoCrFeMnNi high-entropy alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,801,10. |
| MLA | Sun, S. J.,et al."Revisiting the role of prestrain history in the mechanical properties of ultrafine-grained CoCrFeMnNi high-entropy alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 801(2021):10. |
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