A novel, non-equiatomic NiCrWFeTi high-entropy alloy with exceptional phase stability

被引：15
|
作者：
Yang, Xigang [1 ]
Sun, Defu [1 ]
Zhou, Yun [2 ]
Gao, Yuan [1 ]
Xi, Shengqi [1 ]
Wu, Hongjing [1 ]
He, Cheng [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[2] Southwest Med Univ, Sch Med Informat & Engn, Luzhou 646000, Peoples R China
来源：
MATERIALS LETTERS | 2020年 / 263卷 / 263期
关键词：
High entropy alloys; Phase stability; Phase transformation; Microstructure; MICROSTRUCTURE; ELEMENTS;
D O I：
10.1016/j.matlet.2019.127202
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
It is difficult to increase alloy stability using traditional alloy design approaches due to limited optimized microstructures. A substantial increase in service temperature usually causes the failure of materials with complex phase transformations. Here, we report a strategy to overcome this bottleneck by electronic structure calculations for phase stability in alloy systems. Unlike conventional high entropy alloys (HEAs) based on traditional physical parameters concept, the processing involves a covalent bonding in HEAs, leading to the increase of energy barrier of atomic diffusion. Our approach can effectively resist atoms moving or transposing, resulting in exceptional phase stability in NixCr4WFe9Ti alloy. (C) 2019 Elsevier B.V. All rights reserved.
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页数：4
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