STRAIN-INDUCED INTERACTION OF SUBSTITUTIONAL ATOMS IN CUBIC METALS

The energies of strain-induced (elastic) interaction of pairs of substitutional atoms and host atom displacements around a substitutional atom are calculated for Al, Ag, Au, Cu, Ni, Pd, Cr, alpha-Fe, Mo, Nb, Ta, V, and W taking into account the discrete atomic structure of the host lattice. The elastic constants, Born-von Karman constants of the host lattice, and coefficients of the concentration expansion of the solid solution lattice due to substitutional atoms are the numerical parameters used. A computer calculation is carried out in the general form appropriate for any substitutional atoms in these metals. The energies of strain-induced interaction of substitutional atoms are of the same order as the 'chemical' interaction energy and should be taken into account during computer simulation of structure and properties of the substitutional solid solutions.