EFFECTS OF SELF-ACCOMMODATION AND PLASTIC ACCOMMODATION IN MARTENSITIC TRANSFORMATIONS AND MORPHOLOGY OF MARTENSITES

The effects of self-accommodation and plastic accommodation in martens itic transformations and the displacement vector for lattice deformati on are discussed. The authors propose that the formation of an invaria nt habit plane is connected with the self-accomodation between differe nt martensitic variants and results in the formation of internal twinn ed martensites; the plastic accommodation, rather than self-accommodat ion, occurs between parent and new phases when the strength is low or the dislocation density is high for the parent phase and the invariant habit plane is difficult to form, resulting in the formation of dislo cation martensites.