Tuning the defects in face centered cubic high entropy alloy via temperature-dependent stacking fault energy

被引：45
|
作者：
He, Feng [1 ,2 ]
Wang, Zhijun [1 ]
Wu, Qingfeng [1 ]
Chen, Da [2 ,3 ]
Yang, Tao [2 ]
Li, Junjie [1 ]
Wang, Jincheng [1 ]
Liu, C. T. [2 ]
Kai, Ji-jung [2 ,3 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
[2] City Univ Hong Kong, Dept Mech & Biomed Engn, Hong Kong, Hong Kong, Peoples R China
[3] City Univ Hong Kong, Ctr Adv Nucl Safety & Sustainable Dev, Hong Kong, Hong Kong, Peoples R China
来源：
SCRIPTA MATERIALIA | 2018年 / 155卷
基金：
中国国家自然科学基金;
关键词：
High entropy alloy; Defects; Stacking fault energy; ANNEALING TWINS; CRITICAL STRESS; DEFORMATION; COPPER; EVOLUTION; BEHAVIOR; METALS; ORIGIN; GROWTH;
D O I：
10.1016/j.scriptamat.2018.06.002
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Extreme-low (even negative) and strong temperature-dependent stacking fault energy (SFE) is one of the most unique properties in face centered cubic (FCC) high entropy alloys (HEAs). Here, by making full use of this unique property, we present a proof-of-principle investigation of tuning defects in FCC HEAs through changing SFE during deformation. A qualitative model is proposed to predict the possibilities of different types of defects in FCC HEM. Following this model, different defects combinations, instead of individual defects, are well controlled by rolling. FCC HEAs with balanced dislocation, stacking faults and twins show good balance between strength and ductility. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：134 / 138
页数：5
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