CoCuFeNi high entropy alloy reinforced by in-situ W particles

Huan Ma; Yang Shao; Chan Hung Shek

doi:10.1016/j.msea.2020.140218

CoCuFeNi high entropy alloy reinforced by in-situ W particles

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Overview

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Author(s)

Related Research Unit(s)

Department of Materials Science and Engineering

Detail(s)

Original language	English
Article number	140218
Journal / Publication	Materials Science and Engineering A
Volume	797
Online published	2 Sept 2020
Publication status	Published - 21 Oct 2020

Link(s)

DOI	DOI https://doi.org/10.1016/j.msea.2020.140218 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85090592736&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(18ebfaca-e29d-4116-aa3c-c7f10c2e6d7b).html

Abstract

(CoCuFeNi)_100-xW_x (x = 0, 5, 15) high entropy alloys (HEAs) were prepared by arc melting. Five atomic percent of tungsten can completely dissolve into CoCuFeNi, forming face-centered cubic solid solution. In-situ W particles formed in CoCuFeNi matrix with 15 at.% W addition with semi-coherent interface between W particles and CoCuFeNi matrix. The yield strength of (CoCuFeNi)₈₅W₁₅ was increased by ~46% with minor reduction in ductility compared with CoCuFeNi HEA. The strengthening mechanisms for (CoCuFeNi)₈₅W₁₅ included solid solution strengthening, grain refinement strengthening as well as second phase strengthening. The ductility of (CoCuFeNi)₈₅W₁₅ was resulted from grain size refinement and the plasticity of W particles and CoCuFeNi.