The shape and mobility of dislocations gliding (climbing) over the crystal relief were studied. The mobility of a dislocation was governed by the probability of critical nucleation on it of various defects (the formation of a double kink or break-away from a barrier during sliding, the formation of a jog during absorption (emission) of an interstitial (vacancy) during climbing, etc.). It was demonstrated that the transitional and steady-state modes of dislocation motion exist (the transitional and steady-state modes of deformation). The time required to achieve the steady-state dislocation motion and the velocity of this motion in the absence and in the presence of various types of pinning (drag) centres were calculated. The pinning centres qualitatively change the steady-state velocity of dislocations and increase the time required to reach this mode of motion.

Statistical Description of the Shape of a Moving Dislocation. V.M.Chernov, E.I.Persiyanova: Physics of the Solid State, 2008, 50[4], 649-54