HIGH-TEMPERATURE PLANE-STRAIN COMPRESSION OF CUBE ORIENTED ALUMINUM CRYSTALS

The influence of deformation temperature on the stability of the (001)[100] and (001)[110] orientations of Al and Al-1%Mn crystals has been determined by means of channel die tests at 200-400-degrees-C. X-ray pole figures and EBSP analyses demonstrate that the (001)[110] crystals decompose at all temperatures into deformation bands of complementary {112}[111BAR] orientations. The behaviour of the cube orientation is temperature and strain rate dependent: at T < 0.6T(m) (approximately 300-degrees-C) decomposition into bands of octahedral slip occurs whereas at higher temperatures the cube orientation deforms by double slip on {110}[110BAR] systems and is stable up to high strains (epsilon approximately 1.5). A simple analytical model and numerical simulations confirm that {110}[110BAR] slip affects the near-cube orientations and tends to stabilize the cube orientation; the latter can be considered as a hot rolling texture component.