Revisiting the role of prestrain history in the mechanical properties of ultrafine-grained CoCrFeMnNi high-entropy alloy

doi:10.1016/j.msea.2020.140398

IMR OpenIR

	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
通讯作者	Tian, Y. Z.(tianyanzhong@mail.neu.edu.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
	2021-01-13
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	801 页码:10
摘要	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.
关键词	High-entropy alloy Prestrain Deformation twins Cryogenic strengthening Yield strength
资助者	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
收录类别	SCI
语种	英语
资助项目	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研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000600421200002
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：35[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/158717
专题	中国科学院金属研究所
通讯作者	Tian, Y. Z.; Zhang, Z. F.
作者单位	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
推荐引用方式 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.