Phase stresses induced by γ → α transformation in iron polycrystal

The analysis of the evolution of the phase stresses, originating in the process of the γ → α transformation in the polycrystalline iron, is carried out on the basis of the elastoplastic spherical inclusion model. Correspondingly isolated areas of the α-phase (ferrite) and γ-phase (austenite) are considered as inclusions at the initial and final transformation stages. The stresses are calculated with an account of the plastic flow in the spherical layer (matrix) around these inclusions. The identified dependence of the hydrostatic phase strains on the ferrite volumetric ration assumes, that they decelerate the initial transformation stage and accelerate its final stage