Abstract
Simple shear deformation of a precipitation hardened aluminum alloy showed the formation of planar deformation bands on a set of parallel {111} planes. Band formation is more profuse in the near {101}[uvw] and {111}[uvw] oriented grains and their lateral growth is limited by the formation of special coincident site lattice boundaries. Irrespective of the parent grain orientation, these deformation bands are misoriented by approx. 40° with respect to the parent grain. The extended dislocations could not cross-slip, promoting planar slip and the formation of planar deformation bands upon persistent plastic deformation.
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