Solid solutioning in equiatomic alloys : Limit set by topological instability

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

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)410-413
Journal / PublicationJournal of Alloys and Compounds
Volume583
Online published8 Sep 2013
Publication statusPublished - 15 Jan 2014

Abstract

Solid solutioning in equiatomic alloys becomes an interesting and timely topic, considering the current interest at high-entropy alloys (HEAs) in the materials community. In the circumstances where there is no such a differentiation of the solvent and solutes, it is intriguing to explore the solid solution limit in HEAs. In this work, a series of fcc structured equiatomic alloys were specially designed, following the valence electron concentration rule, to study the solid solutioning in the assumed pseudo binary Ni-X (X = Co, Fe, Cr, Cu) systems. The solid solution limit of the multi-component equiatomic alloys was found to set by the topological instability. The decomposition of the single-phase solid solution occurred when the lattice distortion reached a critical strain of 0.018. © 2013 Elsevier B.V. All rights reserved.

Research Area(s)

  • High-entropy alloys, Multicomponent solidification, X-ray diffraction