Martensitic phase transformation

Abstract

This chapter provides a summary of basic knowledge on martensitic phase transformation in general and in steels, in particular. Besides the thermodynamic aspects of martensitic phase transformation, the different transformation path’s (direct γ to α’, direct γ to ε, direct ε to α’ and indirect γ to ε to α’) occurring in steels are described in detail in combination with the relevant orientation relationships. In addition, the influence of stacking-fault energy is discussed. Finally, the kinetics of the martensite transformation process is described according to the well-known Olson–Cohen model.