Cold-Rolling and Recrystallization Textures of Al-Cu Alloys

Abstract

The effect of solution-treatment prior to cold-rolling on the textures of Al-Cu alloys was studied by the X-ray pole figure method. The following results were obtained:
(1) No marked effect of the solution-treatment on the cold-rolling textures of Al-Cu alloys was observed.
(2) The recrystallization textures varied remarkably by the solution-treatment. The recrystallization textures of Al-Cu alloys which had not been solution-treated were found to be composed of two preferred orientations of (100)[001] and (632)[5\bar5\bar7] or (113)[33\bar2]. Whereas the recrystallization textures of Al-Cu alloys which had been solution-treated before rolling consisted of two preferred orientations of (100)[001] and (110)[1\bar10]. The amount of the (100)[001] type component in the recrystallization textures was increased by the solution-treatment before rolling.
(3) The orientation relationships between the preferred orientations in the cold-rolling texture and those in the recrystallization texture can be expressed as ⟨111⟩ rotations of 20° to 40°.
(4) The variation of the recrystallization texture by the solution-treatment prior to cold-rolling may be attributed partly to the change in the distribution of precipitates during the incubation period of the primary recrystallization, which has influence on the selective nucleation or growth of the nuclei, and partly to the suppression of the random nucleation around the precipitated particles.