Effect of pre-deformation and B2 morphology on the mechanical properties of Al0.5CoCrFeNi HEA

被引：26

作者：

Aizenshtein, M. ^{[1
]}

Priel, E. ^{[1
,2
]}

Hayun, S. ^{[3
]}

机构：

[1] NRCN Negev, Dept Mat Engn, Beer Sheva, Israel

[2] Shamoon Coll Engn, Ctr Thermomech & Failure Mat, Dept Mech Engn, Ashdod, Israel

[3] Ben Gurion Univ Negev, Dept Mat Engn, Beer Sheva, Israel

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 788卷

关键词：

HEAs; Microstructure; Mechanical properties; Finite element analysis; Dislocations; HIGH-ENTROPY ALLOYS; STRESS-STRAIN BEHAVIOR; MICROSTRUCTURE; TEMPERATURE; DUCTILITY;

D O I：

10.1016/j.msea.2020.139575

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Al0.5CoCrFeNi is a promising alloy in the AlxCoCrFeNi series, since it contains a mixture of the ductile fcc phase (A1) and the hard and ordered bcc phase (B2). The combination of the two forms a "metallic composite" with mechanical properties that can be modified by different thermo-mechanical treatments. In this study, it was shown that deformation prior to heat treatment can alter the B2 phase morphology from "plate-like" to equiaxed morphology. The mechanical properties of Al0.5CoCrFeNi were determined by utilizing compression experiments in conjunction with non-linear finite element analysis. The results showed that in all cases, pre-heat treatment deformation led to a reduction in the effective yield stress. This behavior correlates with the changes in the B2 morphology resulting from the pre-heat treatment deformation. Moreover, the effective yield stress decreased with increasing heat treatment temperature for both pre-deformed and undeformed samples.

引用

页数：9

共 21 条

[21] Microstructure and mechanical properties of CoCrFeNiTiAlx high-entropy alloys [J].

Zhang, K. B. ;

Fu, Z. Y. ;

Zhang, J. Y. ;

Wang, W. M. ;

Wang, H. ;

Wang, Y. C. ;

Zhang, Q. J. ;

Shi, J. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 508 (1-2) :214-219

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