Unit Cell Volume, and Lattice Parameter of Cubic High Entropy Alloys

TL;DR

This paper derives and validates an equation to predict the unit cell volume and lattice parameters of cubic high entropy alloys, providing a more accurate method compared to Vegards law.

Contribution

The paper introduces a new equation for predicting lattice parameters of cubic HEAs, validated against experimental data and compared with Vegards law.

Findings

Derived equation matches experimental data with low error

Predicted lattice parameters are more accurate than Vegards law

Validated with 68 high entropy alloys

Abstract

An equation has been derived to predict unit cell volume of high entropy alloys, HEA, by two different methods. Both treatments led to the same equation. For cubic HEA lattice parameters were calculated. The predicted lattice parameters were compared with those reported for 68 HEAs. Lattice parameters were also calculated using the equivalent of Vegards law for these alloys. Average errors were 0.52, and 0.42 when Vegards law, and the equation derived in this work were used, respectively.