A contrast-simulation program was developed for the quantitative evaluation of the transmission electron microscopic images of dissociated dislocations. These image simulations used the column approximation, and took account of many beams and linear anisotropic elasticity. The program also permitted images to be simulated for samples which contained any number of straight dislocations and planar faults, and which crystallized in the cubic, hexagonal, tetragonal or orthorhombic structure. The defects could be arbitrarily positioned in wedge-shaped samples. The shape of the samples permitted the sign of the Burgers vector to be obtained, due to the presence of thickness fringes. The image simulations revealed the effects of elastic anisotropy and defect position upon contrast.

Simulation of Electron Microscope Dislocation Images in Cubic and Non-Cubic Structures. H.Heinrich, F.Král, G.Kostorz: Materials Science and Engineering A, 1997, 234-236, 347-50