Predicting yield strengths of noble metal high entropy alloys

Recent data on the Noble metal (Pd-Pt-Rh-Ir-Au-Ag-Cu-Ni) high entropy alloys (HEAs) shows some of these materials to have impressive mechanical properties. Here, a mechanistic theory for the temperature-, composition-, and strain-rate-dependence of the initial yield strength of fcc HEAs is applied to this alloy class, with inputs obtained through “rule-of-mixtures” models for both alloy lattice and elastic constants. Predictions for PdPtRhIrCuNi...