  The yield strengths of High Entropy Alloys have recently been correlated with
measured picometer-scale atomic distortions. Here, the root mean square
microdistortion in a multicomponent alloy is shown to be nearly proportional to
the misfit-volume parameter that enters into a predictive model of solute
strengthening. Analysis of two model ternary alloy families, face-centered
cubic Cr-Fe-Ni and body-centered cubic Nb-Mo-V, demonstrates the correlation
over a wide composition space. The reported correlation of yield strength with
microdistortion is thus a consequence of the correlation between
microdistortion and misfit parameter and the derived dependence of yield
strength on the misfit parameter.

Materials Science