Stability of rolling texture during heat treatment in a two-phase Ti 3Al base intermetallic alloy

Abstract

The stability of hot rolling texture developed in the α 2 phase of a two-phase Ti 3Al base intermetallic alloy, during subsequent heat treatment, has been systematically investigated. The basal hot rolling texture remains rather stable during recrystallization annealing at temperatures within the single phase α 2 range. Grain growth after recrystallization produces extra orientations other than the basal. For the material with a starting basal texture, heat treatment in the upper α 2, ( α 2+ β) or β phase fields does not change the basic character of the texture, although the sharpness and especially the width of the basal component increase to some extent with the increase in the heat treatment temperature. Heat treatment of material with starting non-basal texture in the upper α 2, ( α 2+ β) or β phase fields does not produce any basal component irrespective of the heat treatment temperature. When the starting material is reasonably strain free and possesses a weak basal texture, heat treatment in the upper α 2, ( α 2+ β) or β phase fields helps in intensifying the basal component to a certain extent.