Effect of Co content on the mechanical properties of A2 and B2 phases in AlCoxCrFeNi high-entropy alloys

被引：72
|
作者：
Kang, Minju [1 ]
Lim, Ka Ram [1 ]
Won, Jong Woo [1 ]
Na, Young Sang [1 ]
机构：
[1] Korea Inst Mat Sci, 797 Changwondae Ro, Chang Won 642831, Gyeongnam, South Korea
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 769卷
基金：
新加坡国家研究基金会;
关键词：
High entropy alloy; Indentation; Hardness; PRINCIPAL ELEMENTS; MICROSTRUCTURE; NANOINDENTATION; EVOLUTION; STRENGTH; SYSTEM; STEELS; SIZE;
D O I：
10.1016/j.jallcom.2018.07.346
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of entropy on the strengths of the disordered and ordered phases was investigated. Cost effective AlCoxCrFeNi (x = 0, 0.25, 0.5, 0.75, and 1) high-entropy alloys were fabricated reducing Co content. The strength was considerably reduced when the Co content was zero. This was attributed to the low hardness of the A2 phase due to reduced configurational entropy compared with quinary system. On the other hand, the ordered B2 phase showed the opposite tendency. This result shows that the configurational entropy causes opposing effects on disordered and ordered phases, and the importance of considering the effect of entropy on each phase when the number of elements changed, and an alloy is composed of two or more phases, in particular, having BCC structure. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：808 / 812
页数：5
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