Methods for determining the distribution of spacings between near-planar dislocation boundaries were considered. Distributions of spacings for these boundaries were determined for both monocrystalline and polycrystalline samples. The misorientations across the extended planar dislocation boundaries were also measured for monocrystalline samples. The probability density distribution for the spacings exhibited a scaling behavior which was of almost identical form to that found for the probability density distribution of misorientation angles across the boundaries. The scaling behavior of the spacing distributions persisted for strains ranging from 0.2 to 4.5, for various materials and deformation conditions. The scaling behavior of the boundary spacings could be accounted for in terms of simple geometrical models which allowed for formation or coalescence of the walls.

Scaling of the Spacing of Deformation-Induced Dislocation Boundaries. A.Godfrey, D.A.Hughes: Acta Materialia, 2000, 48[8], 1897-905