To investigate electronic aspects of martensitic phase transformations
in transition-metal alloys, the Coherent Potential Approximation with
in the Korringa-Kohn-Rostocker scheme is used for calculation of band
structures and total energies of disordered alloys. In the case of the
pure d-electron system Fe-Ni, this method clearly shows how d-electro
n magnetism stabilizes the BCC structure. In the case of the Hume-Roth
ery alloy Cu-Zn, d- and p-electrons seem to play an equally important
role.