Temperature dependent deformation mechanisms of Al0.3CoCrFeNi high-entropy alloy, starting from serrated flow behavior

被引：28
作者：
Zhang, Yu [1 ]
Li, Jinshan [1 ]
Wang, Jun [1 ]
Wang, William Yi [1 ]
Kou, Hongchao [1 ]
Beaugnon, Eric [2 ,3 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
[2] Univ Grenoble Alps, LNCMI, F-38000 Grenoble, France
[3] CNRS, LNCMI, F-38000 Grenoble, France
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 757卷
关键词：
High-entropy alloys; Deformation mechanisms; Serrations; Twinning; Stacking faults; STACKING-FAULT ENERGY; STRAIN;
D O I：
10.1016/j.jallcom.2018.04.305
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 deformation mechanisms of Al0.3CoCrFeNi high-entropy alloy (HEA) is investigated through studying the serrated flow behavior under different conditions. Results show that abnormal variation trends happen in the serration curves during compression, denoting a transition of the deformation mechanism with the temperature increasing. Microstructure characterization reveals this transition is a twining to slip deformation, which is evidenced by nanoscale twins at 600 degrees C but high density dislocations at 800 degrees C. This temperature dependent deformation behavior is thought to be related with the dislocation mobility and stacking fault energy (SFE). (C) 2018 Elsevier B.V. All rights reserved.
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收藏
页码：39 / 43
页数：5
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