The standard continuum view of dislocation transmission, in which a Volterra or Peierls dislocation interacted with a non-slipping interface, was extended. The extension proposed here was to use a modified Peierls description of the dislocation on the incoming and outgoing slip planes, and to let the interface slip according to a simple

periodic constitutive relationship. The interface could thus store and emit dislocations during the transmission process. The analysis was restricted to a screw dislocation which was oriented parallel to the interface; with incoming and outgoing slip planes that were normal to the interface, and with Burgers vectors that were the same on each side of the interface. The latter restriction was characteristic of coherent interfaces. The results showed that the critical stress for transmission could be increased markedly by decreasing the elastic shear modulus and unstable stacking-fault energy of the interface. In such cases, a significant portion of the dislocation core could become stored in the interface during transmission, so that the critical transmission step was to extract the core from the interface.

A Peierls Analysis of the Critical Stress for Transmission of a Screw Dislocation across a Coherent, Sliding Interface. P.M.Anderson, Z.Li: Materials Science and Engineering A, 2001, 319-321, 182-7