Abstract
This paper investigates the reasons why the weak-beam contrast of dislocations is largely insensitive to elastic anisotropy. Particular attention is paid to the applicability of the g·b, = 0 invisibility criterion for Burgers vector determination to crystals with large elastic anisotropy factors. For this purpose, a method has been designed to allow for a direct comparison between weak-beam images simulated under different g·b, imaging conditions.