Simultaneously increasing mechanical and corrosion properties in CoCrFeNiCu high entropy alloy via friction stir processing with an improved hemispherical convex tool

doi:10.1016/j.matchar.2023.113143

IMR OpenIR

	Simultaneously increasing mechanical and corrosion properties in CoCrFeNiCu high entropy alloy via friction stir processing with an improved hemispherical convex tool
	Li, N.1,2; Zhang, H.1,2,3; Wu, L. H.1,2,3; Li, Z. K.2; Fu, H. M.2; Ni, D. R.1,2; Xue, P.1,2,3; Liu, F. C.2; Xiao, B. L.1,2; Ma, Z. Y.1,2
通讯作者	Wu, L. H.(lhwu@imr.ac.cn) ; Ni, D. R.(drni@imr.ac.cn)
	2023-09-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	203 页码:13
摘要	It generally shows the trade-off for the mechanical properties and corrosion resistance of high entropy alloys (HEAs). In this study, friction stir processing (FSP) with an improved hemispherical convex tool was applied to process the as-cast CoCrFeNiCu HEA, which simultaneously increased the mechanical properties and corrosion resistance of the HEA by a large degree. After FSP, the grains were significantly refined from 6 & mu;m to-300 nm, with 91% of high angle grain boundaries and 18% of nanometer twins, leading to a remarkable increase in the yield strength from-194 MPa to-935 MPa. More importantly, the FSP HEA showed an excellent strength ductility synergy with yield strength of-695 MPa and a uniform tensile elongation of-17.5% after annealing, which was mainly attributed to the comprehensive role of equiaxed ultrafine microstructure, second phase and the high fraction of annealing twins (27%). In addition, the FSP HEA showed higher corrosion resistance than the base material by electrochemical test, which was mainly attributed to the improvement of the self corrosion potential and the stability of the passivation film caused by the mitigation of Cu segregation and grain refinement. This study provides a new way to simultaneously increase the mechanical properties and corrosion resistance in HEAs.
关键词	Friction stir processing High entropy alloy Microstructure Mechanical properties Corrosion resistance
资助者	National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Liaon-ing Provincial Natural Science Foundation ; LiaoNing Revitalization Talents Program
DOI	10.1016/j.matchar.2023.113143
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52271043] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2021193] ; Liaon-ing Provincial Natural Science Foundation[2021-YQ-01] ; Liaon-ing Provincial Natural Science Foundation[2021-MS-007] ; LiaoNing Revitalization Talents Program[XLYC2002099]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:001046505700001
出版者	ELSEVIER SCIENCE INC
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/178814
专题	中国科学院金属研究所
通讯作者	Wu, L. H.; Ni, D. R.
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi changxu innovat Ctr Adv Mat, 72 Wenhua Rd, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li, N.,Zhang, H.,Wu, L. H.,et al. Simultaneously increasing mechanical and corrosion properties in CoCrFeNiCu high entropy alloy via friction stir processing with an improved hemispherical convex tool[J]. MATERIALS CHARACTERIZATION,2023,203:13.
APA	Li, N..,Zhang, H..,Wu, L. H..,Li, Z. K..,Fu, H. M..,...&Ma, Z. Y..(2023).Simultaneously increasing mechanical and corrosion properties in CoCrFeNiCu high entropy alloy via friction stir processing with an improved hemispherical convex tool.MATERIALS CHARACTERIZATION,203,13.
MLA	Li, N.,et al."Simultaneously increasing mechanical and corrosion properties in CoCrFeNiCu high entropy alloy via friction stir processing with an improved hemispherical convex tool".MATERIALS CHARACTERIZATION 203(2023):13.