Average-atom interatomic potential for random alloys

An average-atom (Aatom) embedded-atom-method potential for random multicomponent alloys at any composition is derived analytically and validated by comparing Aatom and true random alloys bulk and defect properties, in model Fe-Ni-Cr systems. The Aatom can be mixed with the individual alloying-element potentials, thus enabling computation of defect/defect interactions. Its use provides quantitative insight into the physical role of the...