The ensemble-averaged effective velocity of dislocations experiencing spontaneous transitions between mobile and low-mobility states of their cores was calculated. It was found that the dependence of the averaged kinetics of dislocations on stress and temperature was modified considerably as compared to ordinary slip. The description of macroscopic plastic deformation on the basis of the proposed model demonstrated the presence of an anomalous peak in the deforming stress in the elevated temperature region. A thermo-activation procedure was proposed for analysis of experimental data in the region of anomalous growth in the deforming stress upon an increase in temperature. The theoretically predicted dependence of the position of the peak (on the temperature scale) on the strain rate was compared with experimental data for β-CuZn.

Mobility of Dislocations with Spontaneous Rearrangement of Core States and Anomalous Plasticity of Crystalline Materials. B.V.Petukhov: Physics of the Solid State, 2002, 44[12], 2251-6