Strengthening the CoCrFeNiNb0.25 high entropy alloy by FCC precipitate

被引：99
作者：
He, Feng [1 ]
Wang, Zhijun [1 ]
Niu, Sizhe [1 ]
Wu, Qingfeng [1 ]
Li, Junjie [1 ]
Wang, Jincheng [1 ]
Liu, C. T. [2 ]
Dang, Yingying [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
[2] City Univ Hong Kong, Coll Sci & Engn, Dept Mech & Biomed Engn, Ctr Adv Struct Mat, Kowloon, Hong Kong, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 667卷
基金：
中国国家自然科学基金;
关键词：
Strengthening; High entropy alloys; Precipitation; MICROSTRUCTURE; EVOLUTION; TEXTURE; STRAIN;
D O I：
10.1016/j.jallcom.2016.01.153
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：
High entropy alloys (HEAs) are facing difficulties in balancing strength and ductility, and till now there is no satisfactory solution. In this paper, the CoCrFeNiNb0.25 HEA with good ductility was strengthened by a face centered cubic (FCC) precipitate after annealing heat treatment. When the CoCrFeNiNb0.25 HEA was annealed at 750 degrees C, a lath-shaped FCC precipitates with nano basket-weave microstructures appeared and distributed randomly in the proeutectic FCC phase. Due to the precipitation strengthening, the yield stress of the CoCrFeNiNb0.25 HEA almost doubled but its ductility was just slightly damaged. (c) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：53 / 57
页数：5
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