CoCuFeNi high entropy alloy reinforced by in-situ W particles

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Article number140218
Journal / PublicationMaterials Science and Engineering A
Volume797
Online published2 Sep 2020
Publication statusPublished - 21 Oct 2020

Abstract

(CoCuFeNi)100-xWx (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.

Research Area(s)

  • High entropy alloy, In-situ W particle, Mechanical property, Microstructure