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.

引用

页数：4

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