Orientation inhomogeneities within individual grains in cold-rolled aluminium resolved by electron backscatter diffraction

A recently developed scheme for evaluation of orientation data gathered by electron backscatter diffraction is employed on individual grains in a deformed state. The potential of the method is illustrated on aluminium cold-rolled to 38%. The orientation distribution in each grain is characterized by its anisotropy and the average orientation spread. The dependence of both parameters on grain size is discussed. The preferred rotation axes in each grain are determined and compared with macroscopic directions. From the disorientation angles with respect to the preferred rotation axis characteristic features of the deformation structure as alternating orientation differences or orientation gradients can be resolved.