Premium
High‐Strength AlCrFeCoNi High Entropy Alloys Fabricated by Using Metallic Glass Powder as Precursor
Author(s) -
Yang Chao,
Lin Jianan,
Zeng Jin,
Qu Shenggua.,
Li Xiaoqiang,
Zhang Weiwen,
Zhang Datong
Publication year - 2016
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500339
Subject(s) - materials science , high entropy alloys , microstructure , ductility (earth science) , powder metallurgy , phase (matter) , composite material , metallurgy , amorphous metal , metal , alloy , creep , chemistry , organic chemistry
The report on the formation of high‐strength AlCrFeCoNi HEAs fabricated by using metallic glass powder as precursor is presented. XRD and SEM analysis indicate that the fabricated HEAs have a two‐phase microstructure of a micron‐sized BCC solid solution matrix surrounding a dispersed micron‐sized BCC region. TEM observation reveals that the two‐phase region is all composed of two kinds of nano/ultrafine‐grained BCC grains with respective composition distributions of the Al, Ni rich and Cr, Fe deplete, and the Cr, Fe rich and Al, Ni deplete. Moreover, the fabricated HEAs exhibit simultaneous ultra‐high fracture strength and large ductility, far superior to the cast counterpart HEAs. The results provide a promising method for fabricating large‐sized HEAs with excellent mechanical properties by powder metallurgy.