Planar dislocation interactions in anisotropic media with applications to nodes

A simple graphical technique for solving planar dislocation interaction problems, based on recent theoretical advances in anisotropic dislocation theory, is presented. The method is quite efficient since it limits numerical computation to the generation of a set of tables of energy factor data. As an example, the method is applied to the problem of dislocation nodes and networks in bcc iron. Theoretically predicted node angles are very close to those observed experimentally. The need for including anisotropy, in a precise fashion, in interaction problems is demonstrated.