An attempt was made to reconcile observations and theories of cross-slip with models of cyclic plasticity and the fatigue endurance limit of crystals. According to this view, the stress required to separate 2 screw dislocations of opposite signs, which were just on the point of mutual annihilation by cross-slip, controlled the stress at the end of linear (stage-II) hardening and the saturation stress in the cyclic stress-strain curve. It was shown that the direct annihilation of the dislocations could not account for the temperature dependence of the stress, although it could perhaps account for observations on Ag and Cu at liquid-He temperatures. On the basis of the work of Hirsch, a model of stress-aided jog migration was proposed which seemed to be able to account for observations if the activation energy for migration was equal to about 0.1eV in Cu, Ni and Al. The model inspired a possible re-interpretation of Bordoni peaks, in the damping of face-centered metals, in terms of jog migration.

A Dipole Model for the Cross-Slip of Screw Dislocations in FCC Metals. L.M.Brown: Philosophical Magazine A, 2002, 82[9], 1691-711