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Heterostructuring an equiatomic CoNiFe medium-entropy alloy for enhanced yield strength and ductility synergy

文献类型：期刊论文

作者Ding, Xin-Xin3,4; Wang, Jing3; Liu, Dong2,3; Wang, Chang1; Jiang, Ping3; Qu, Hua4; Liu, Guang-Hua4; Yuan, Fu-Ping2,3; Wu, Xiao-Lei2,3; Jiang P(姜萍)
刊名RARE METALS
出版日期2022-05-22
页码12
ISSN号1001-0521
关键词Heterostructure (HS) Medium-entropy alloy (MEA) Hetero-deformation Ductility Strength
DOI10.1007/s12598-022-01986-3
通讯作者Liu, Guang-Hua(liuguanghua@tiangong.edu.cn) ; Wu, Xiao-Lei(xlwu@imech.ac.cn)
英文摘要High-/medium-entropy alloys (H/MEAs) of face-centered-cubic-structured single phase usually suffer from a glaring drawback of low yield strength. Even worse, the trade-off emerges frustratingly between strength and ductility as strength increases. Here, the lamellar heterostructure (HS) is designed in an equiatomic ternary CoNiFe MEA by means of cold rolling followed by an incomplete recrystallization annealing. The lamellar HS consists of the soft recrystallized grains as well as severely deformed structures which are partly reserved. By comparison to the coarse-grained counterpart, the lamellar HS, shows a well enhanced yield strength-ductility synergy, together with an increased yield strength. This is ascribed to the hetero-deformation-induced (HDI) stress in HS during tensile deformation. Accordingly, the HDI strain hardening is induced, serving as an important addition to the conventional forest hardening. The HDI hardening is evidenced experimentally to account for a large proportion of global strain hardening. Furthermore, a fully recrystallized microstructure is obtained to show a simultaneous increase in both yield strength and ductility. The microstructures are evaluated in detail prior to and after tensile deformation by using the electron backscattered diffraction and transmission electron microscope observations. The mechanism for HDI strain hardening in various microstructures is analyzed to correlate to the evolution of microstructures in terms of the kernel average misorientation values, Schmid factor, and dislocation behaviors in response to plastic deformation.
WOS关键词MECHANICAL-PROPERTIES ; SOLID-SOLUTION ; GRADIENT ; PLASTICITY ; SIZE
资助项目National Key R&D Program of China[2017YFA0204402] ; National Key R&D Program of China[2019YFA0209900] ; National Natural Science Foundation of China[11972350] ; National Natural Science Foundation of China[11790293] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503]
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:000799676100001
资助机构National Key R&D Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://dspace.imech.ac.cn/handle/311007/89438]  
专题力学研究所_非线性力学国家重点实验室
通讯作者Liu, Guang-Hua; Wu, Xiao-Lei
作者单位1.Cent Iron & Steel Res Inst, Special Steel Dept, Beijing 100081, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
4.Tiangong Univ, Sch Phys Sci & Technol, Tianjin 300387, Peoples R China
推荐引用方式
GB/T 7714		 Ding, Xin-Xin,Wang, Jing,Liu, Dong,et al. Heterostructuring an equiatomic CoNiFe medium-entropy alloy for enhanced yield strength and ductility synergy[J]. RARE METALS,2022:12.
APA Ding, Xin-Xin.,Wang, Jing.,Liu, Dong.,Wang, Chang.,Jiang, Ping.,...&Liu D.(2022).Heterostructuring an equiatomic CoNiFe medium-entropy alloy for enhanced yield strength and ductility synergy.RARE METALS,12.
MLA Ding, Xin-Xin,et al."Heterostructuring an equiatomic CoNiFe medium-entropy alloy for enhanced yield strength and ductility synergy".RARE METALS (2022):12.

入库方式： OAI收割

来源：力学研究所

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