A SELF-CONSISTENT APPROACH FOR MODELING TEXTURE DEVELOPMENT OF 2-PHASE POLYCRYSTALS - APPLICATION TO TITANIUM-ALLOYS

A large strain self-consistent viscoplastic model is proposed, develop ed and applied to a two-phase polycrystal. This model accounts For cry stallographic textures and grain morphologies, as well as for the phas e correlation, both in space and orientation. The basic formulation is shown and the case of lamellar (alpha + beta) Ti alloys in rolling is studied. In these alloys, the two phases exhibit specific morphologic and crystallographic correlations. The present study shows that the m odel leads to better texture predictions when all these correlations a re accounted for. (C) 1997 Acta Metallurgica Inc.