Elemental segregation in solid-solution high-entropy alloys : Experiments and modeling

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

20 Scopus Citations
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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)167-174
Journal / PublicationJournal of Alloys and Compounds
Volume681
Publication statusPublished - 5 Oct 2016

Abstract

Recent experiments showed that elemental segregation occurs in some high entropy alloys (HEAs) although their X-ray diffraction patterns exhibit a nominal single-phase solid solution structure. Based on the 3-D atom probe tomography (APT) results obtained from the FeNiCoCrCu HEA, here we propose a simple thermodynamics model based on the notion that elemental segregation facilitates stabilizing the solid solution phase with a minimized Gibbs free energy. Our model enables distinguishing nominal single-phased solid-solution HEAs with and without elemental segregation. The predictions of our model are found in good agreement with the experimental data reported hitherto in the literature.

Research Area(s)

  • High entropy alloys, Phase stability, Segregation, Thermodynamics