Quantitative prediction of solid solubility limit in single phase high-entropy alloys

Abstract

A thermodynamic model that can predict the solid solubility limit (SSL) in single phase HEAs is proposed. The accuracies of our model and other representative existing models were verified experimentally using a model single phase FCC alloy and 11 alloying elements. The results show that existing models substantially overestimate the SSLs in HEAs, leading to large prediction errors. In contrast, our model has considerably higher accuracy. The mean absolute prediction error for our model is only 2.9 at. %—less than 1/8 that of the best existing model. These results demonstrate that quantitative prediction is achievable through the present model.