Cold Rolling and Annealing Textures of Aluminum-3% Copper Alloy Processed from the Double-Oriented Ingots

Abstract

Cold rolling and annealing textures have been observed in double-oriented ingots of Al-3%Cu alloy cold rolled by 90% in the (100)[001] orientation, (A) after solution-treatment at 520°C for 48 hr and quenching into water, (B) after ageing at 190°C for 48 hr, or (C) after ageing at 250°C for 15.5 hr.
The cold rolling texture of specimen A rolled immediately after the quenching contains a preferred orientation of near (112)[11\bar1], that of specimen B contains (210)[001] and (320)[001] orientations, and that of specimen C contains an orientation near {7,12,22}⟨84\bar5⟩.
The intensity of cube texture component retained after cold rolling is in the order A<B<C, whereas the intensity of the same component contained after primary recrystallization is in the order A>B>C.
The orientation changes during rolling and the orientation relationship between the rolling and recrystallization textures are discussed on the basis of the geometrical analysis of slip-rotation, the oriented growth theory and the oriented nucleation theory.