Predicting solid solubility in CoCrFeNiMx (M=4d transition metal) high-entropy alloys
Artikel i vetenskaplig tidskrift, 2017

CoCrFeMnNi is a prototype fcc-structured high-entropy alloy. Numerous efforts have been paid to strengthen CoCrFeMnNi, by replacing Mn with other elements for an enhancement of the solid solution strengthening. 4d transition metals, including Zr, Nb, and Mo, are of interest for this purpose, since they have much larger atomic radii than that of Mn. However, Nb and Mo are known to have a low solid solubility in fcc-structured CoCrFeNi. Compared to Nb and Mo, Zr has an even larger atomic radius. The solid solubility of Zr in fcc-structured CoCrFeNi was investigated in this work, combining both experimental studies and thermodynamic calculations. In addition, based on previous results and new results obtained here, methods to predict the solid solubility in CoCrFeNiMx (M = Zr, Nb, and Mo) alloys were developed. Particularly, the average d-orbital energy level, Md, was re-evaluated in the present work, for an improved predictability of the solid solubility in fcc-structured high entropy alloys containing 4d transition metals. Published by AIP Publishing.

Författare

Saad Ahmed Sheikh

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

H. H. Mao

Thermo-Calc Software AB

The Royal Institute of Technology (KTH)

Sheng Guo

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Journal of Applied Physics

0021-8979 (ISSN) 1089-7550 (eISSN)

Vol. 121 Article Number: 194903- 194903

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1063/1.4983762