Phase stability and martensitic transformation in metals and alloys

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Abstract
A unified approach, able to take into account the martensitic phase transition onset in binary alloys of transition metals as well as the connected role and influence of ternary additions to the alloy, is presented. The electronic mechanism on which the transition is based is strongly dependent on the electron-phonon coupling in such metals. The concept of electronic behaviour which is donor-like and acceptor-like is tested for the nearly equiatomic shape memory NiTi alloy, leading to very good agreement with the available experimental data.