期刊
MATERIALS CHARACTERIZATION
卷 127, 期 -, 页码 111-115出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2017.02.027
关键词
High-entropy alloy; Amorphization; High-pressure torsion; Deformation twinning
类别
资金
- Hunan Provincial National Natural Science Foundation of China [2015JJ2206]
- Fundamental Research Funds for the Central Universities of Central South University [2016zzts267]
- National Natural Science Foundation of China [51671217]
Using high-resolution electron microcopy, amorphization was observed in a FeCoCrNi high-entropy alloy subjected to high-pressure torsion. The amorphous phase nucleated and grew at twin-twin intersected regions, while its expansion was restricted by the intersected twin boundaries. We show direct experimental evidence that the amorphization in FeCoCrNi high-entropy alloy was driven from the defects accumulation under high pressure and shear stress. These observations provide new insight into the twin-twin intersection and deformation mechanism of high-entropy alloy. (C) 2017 Elsevier Inc. All rights reserved.
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