ASPECTS OF MARTENSITIC PHASE-TRANSFORMATIONS IN TRANSITION-METAL ALLOYS

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.