Computer simulations of the X-ray diffraction patterns of nanostructured samples were carried out on the basis of the kinematic theory of X-ray scattering. Account was taken of various configurations of extrinsic grain boundary dislocation assemblies. A comparison was made with experimental data on the possible configurations of extrinsic grain boundary dislocation assemblies in nanostructured materials which had been severely plastically deformed. It was shown that a typical X-ray diffraction pattern for nanostructured Cu could be described by an equidistant distribution of gliding and sessile extrinsic grain boundary dislocations.

Investigation of Assemblies of Grain Boundary Dislocations in Nanostructured Copper by Computer Simulation. I.V.Alexandrov, N.A.Enikeev, R.Z.Valiev: Materials Science Forum, 1999, 294-296, 207-10