A superior combination of strength-ductility in CoCrFeNiMn high-entropy alloy induced by asymmetric rolling and subsequent annealing treatment

被引：87

作者：

Han, Z. H. ^{[1
]}

Liang, S. ^{[2
]}

Yang, J. ^{[3
]}

Wei, R. ^{[4
]}

Zhang, C. J. ^{[2
]}

机构：

[1] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Shaanxi, Peoples R China

[2] Changan Univ, Sch Mat Sci & Engn, Xian 710048, Shaanxi, Peoples R China

[3] Chuanqing Drilling Engn Co Ltd, Changqing Downhole Technol Co, Xian 710021, Shaanxi, Peoples R China

[4] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Henan, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2018年 / 145卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

High entropy alloys; Mechanical properties; Asymmetric rolling; Microstructure gradient; MECHANICAL-PROPERTIES; THERMAL-STABILITY; STRAIN; MICROSTRUCTURE; DEFORMATION; GRADIENT; PLASTICITY; EVOLUTION; CARBON; STRESS;

D O I：

10.1016/j.matchar.2018.09.029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

CoCrFeMnNi high-entropy alloy with a smaller average grain size and gradient microstructure was produced by asymmetric rolling (ASR) and subsequent annealing treatment, which gave rise to a superior combination of strength-ductility. High back stress, working hardening and geometrically necessary dislocations were detected in the gradient structure. The ultra-high strength of the CoCrFeMnNi high-entropy alloy was related to the fine grain and high back-stress, while the superior ductility was ascribed to the gradient structure and fine grain. ASR followed by annealing might be a novel strategy for designing high entropy alloys with high performance.

引用

页码：619 / 626

页数：8

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