Abstract
The martensitic transformation is induced by deformation in metastable austenitic steels. This is called the deformation-induced martensitic transformation. In order to understand the general nature of deformation-induced martensitic transformation, it is necessary to make clear two types of role of applied stress and plastic strain on the martensitic transformation. Since the martensitic transformation is achieved by the cooperative shear movement of atoms, it is readily seen that the applied stress aids the transformation. However, some questions still remain as to how the applied stress aids the transformation. Also, the role of plastic strain on the martensitic transformation is much more complicated. The author suggests that the deformation-induced martensitic transformation can be understood only in terms of the effect of applied stress rather than the effect of strain. A remarkable increase in elongation is obtained when martensites are formed during deformation. This phenomenon is called the transformation-induced plasticity (TRIP). A cause of TRIP and various controlling factors on TRIP are discussed. Furthermore, the industrial application of the TRIP phenomenon is briefly described.
Get full access to this article
View all access options for this article.