Recrystallization behaviour of {110}〈112〉 aluminium single crystals after rolling and plane-strain deformation

Abstract

After deformation of between 50 and 60% by plane strain, a {110}〈112〉 Al single crystal retains its original orientation throughout the whole cross section of the crystal. On cold rolling, however, bands parallel to the rolling plane are formed which show both gradual and abrupt changes of orientation. On annealing, the boundary between two layers with an abrupt change in orientation is a preferred nucleation site and new crystals are nucleated here at an earlier stage and grow faster than from a surface which was severely and randomly abraded for artificial nucleation. The orientations of the recrystallized grains can be directly related to the mode of deformation.