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：

中国国家自然科学基金; 中国博士后科学基金;

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

共 48 条

[1] Stress-gradient plasticity [J].

Chakravarthy, Srinath S. ;

Curtin, W. A. .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2011, 108 (38) :15716-15720

[2] Enhanced mechanical response of an ultrafine grained Ti-6A1-4V alloy produced through warm symmetric and asymmetric rolling [J].

Chao, Qi ;

Cizek, Pavel ;

Wang, Jiangting ;

Hodgson, Peter D. ;

Beladi, Hossein .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2016, 650 :404-413

[3] Heavy carbon alloyed FCC-structured high entropy alloy with excellent combination of strength and ductility [J].

Chen, L. B. ;

Wei, R. ;

Tang, K. ;

Zhang, J. ;

Jiang, F. ;

He, L. ;

Sun, J. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2018, 716 :150-156

[4] Toughness improvement in hot rolled HSLA steel plates through asymmetric rolling [J].

Chen, S. ;

An, Y. G. ;

Lahaije, C. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2015, 625 :374-379

[5] Design of a twinning-induced plasticity high entropy alloy [J].

Deng, Y. ;

Tasan, C. C. ;

Pradeep, K. G. ;

Springer, H. ;

Kostka, A. ;

Raabe, D. .

ACTA MATERIALIA, 2015, 94 :124-133

[6]

Dieter GE., 1976, MECH METALLURGY

[7] Excellent high strain rate superplasticity of Al-Mg-Sc-Zr alloy sheet produced by an improved asymmetrical rolling process [J].

Duan, Yulu ;

Xu, Guofu ;

Tang, Lei ;

Liu, Yun ;

Xu, Jiawei ;

Deng, Ying ;

Yin, Zhimin .

JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 715 :311-321

[8] Influence of grain size and stacking-fault energy on deformation twinning in fcc metals [J].

El-Danaf, E ;

Kalidindi, SR ;

Doherty, RD .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1999, 30 (05) :1223-1233

[9] On the origin of the tensile flow stress in the stainless steel AISI 316L at 300 K: Back stress and effective stress [J].

Feaugas, X .

ACTA MATERIALIA, 1999, 47 (13) :3617-3632

[10] Tensile properties of high- and medium-entropy alloys [J].

Gali, A. ;

George, E. P. .

INTERMETALLICS, 2013, 39 :74-78

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