Texture evolution in {112} <111> aluminum single crystals processed by severe plastic deformation

A pure aluminum single crystal with (112) [1 1 − 1] orientation was deformed by nine cycles of conventional rolling and accumulative roll bonding (ARB) which corresponded to a rolling strain (ε) of 7.18. (4 4 11) [11 11 − 8] was the main component of the deformation texture. Between the third and seventh cycles (ε = 2.4–5.6), (4 4 11) [11 11 − 8] oriented areas existed stably in the center layer, and this stability could be rationalized by the crystal rotation mechanism reported by Kamikawa et al. and Heason et al. The deformation texture after the ninth cycle included (4 4 11) [11 11 − 8] and (− 4 − 4 11) [11 11 8] components. The formation of the (− 4 − 4 11) [11 11 8] orientation was attributed to crystal rotation from (001) [110], which was formed in the lower surface layer after the seven cycle under lubrication conditions.

► A (112) [1 1 − 1] pure aluminum single crystal was deformed by nine cycles of ARB.
► (4 4 11) [11 11 − 8] was a main component of the deformation texture.
► The texture after the ninth cycle contained a minor component (− 4 − 4 11) [11 11 8].
► (− 4 − 4 11) [11 11 8] was formed by crystal rotation from (001) [110].
► Formation of (− 4 − 4 11) [11 11 8] was understood to be due to a unique ARB process.