Novel as-cast NiAlCoFeNb dual-phase high-entropy alloys with high hardness

被引：10
|
作者：
Gu, Lei [1 ]
Liang, Ningning [1 ]
Liu, Yi [1 ]
Chen, Yuyao [1 ]
Liu, Jihua [1 ]
Sun, Yixing [1 ]
Zhao, Yonghao [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nano & Heterogeneous Mat Ctr, Nanjing 210094, Jiangsu, Peoples R China
来源：
MATERIALS LETTERS | 2022年 / 324卷
基金：
中国国家自然科学基金;
关键词：
Metals and alloys; Microstructure; Crystal structure; Microhardness; B2; phase; Laves phase;
D O I：
10.1016/j.matlet.2022.132676
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure, phase constitution and microhardness of Ni20Al20Co20Fe20Nb20 , Ni25Al25Co20Fe20Nb10 and Ni30Al30Co20Fe15Nb5 high-entropy alloys (HEAs) synthesized by vacuum arc melting have been investigated. These as-cast HEAs have a dual-phase structure including intermetallic NiAl-rich B2 phase and FeNb-rich hexagonal Laves phase, and the Nb increase leads to more fraction of Laves phase. Ultrahigh hardness of ~ 818 HV was achieved in the equiatomic Ni20Al20Co20Fe20Nb20 dual-phase HEA, which is consisted of 61.8 vol% Laves phase and 38.2 vol% B2 phase.
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页数：4
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