The Interaction of He with a ½<111>{110} Edge Dislocation in W and Mo

The positions of the metal atoms around a ½<111>{110} edge dislocation in Mo and W are calculated using the Wilson—Johnson potentials. The boundary conditions are given by anisotropic elasticity theory. The He—metal potential, also developed by Wilson and Johnson, is used to calculate the position with maximum energy gain for a He-atom

Anisotropic strain hardening in F.C.C. polycrystals: A phenomenological model

A new phenomenological model for strain hardening in f.c.c. metals is combined with the polycrystal approach of Budiansky and Wu (Proc. 4th U.S. Natn. Congress of Applied Mechanics, Vol. 2. pp. 1175–1185. Pergamon Press, Oxford, 1962). The strain hardening is assumed to be the result of increasing dislocation densities, where dislocations of opposite polarity can annihilate each other. Back stresses play only a minor role. The numerical results of this model, which contains only six adjustable parameters. are in good agreement with experimental Bauschinger and x-y-tests on commercial copper at room temperatur