Cryogenic electropulsing induced microstructure optimization of a cold-rolled CoCrFeMnNi high-entropy alloy

被引：2
|
作者：
Ben, D. D. [1 ,2 ]
Yang, H. J. [1 ,2 ]
Dong, Y. A. [1 ]
Tian, Y. Z. [3 ]
Sun, S. J. [1 ]
Meng, L. X. [1 ,2 ]
Duan, Q. Q. [1 ]
Zhang, P. [1 ,2 ]
Zhang, Z. F. [1 ,2 ]
机构：
[1] Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol China, Dept Mat Sci & Engn, Shenyang 110016, Peoples R China
[3] Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat Minist Educ, Shenyang 110819, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2023年 / 195卷
基金：
中国国家自然科学基金;
关键词：
High -entropy alloy; Cryogenic; Electropulsing; Recrystallization; Mechanical property; MECHANICAL-PROPERTIES; ELECTRIC-CURRENT; RECRYSTALLIZATION; STEEL; DUCTILITY; STRENGTH; ELECTROMIGRATION; PERFORMANCE; STABILITY; EVOLUTION;
D O I：
10.1016/j.matchar.2022.112557
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Microstructural evolutions of a cold-rolled CoCrFeMnNi high-entropy alloy (HEA) induced by electropulsing treatment at room temperature (RT-EPT) and liquid nitrogen temperature (LN-EPT) were investigated and compared. Finer recrystallized grains were obtained by LN-EPT compared to RT-EPT with the same discharge voltages. The recrystallization mechanisms were discussed based on the electropulsing induced athermal and thermal effects. The former mainly contributes to promoting the nucleation of grains, while the latter mainly affects the new grain growth. Meanwhile, the precipitation of the Cr-rich phase was greatly suppressed due to the electropulsing which is contrary to the annealing samples. The LN-EPT sample being treated with discharging voltage of 6 kV exhibited the highest yield strength (846 MPa) among the EPT samples due to the partially recrystallized heterogeneous microstructure. As a consequence, LN-EPT may be developed as a promising method to fabricate desired microstructure and mechanical properties.
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页数：8
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