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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 AuthorTian, Y. Z.(tianyanzhong@mail.neu.edu.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
2021-01-13
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume801Pages:10
AbstractThe 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.
KeywordHigh-entropy alloy Prestrain Deformation twins Cryogenic strengthening Yield strength
Funding OrganizationFundamental 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
DOI10.1016/j.msea.2020.140398
Indexed BySCI
Language英语
Funding ProjectFundamental 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 AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000600421200002
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/158717
Collection中国科学院金属研究所
Corresponding AuthorTian, Y. Z.; Zhang, Z. F.
Affiliation1.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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