A special feature of thermally activated plastic glide was that the activation energy was not a constant but depended strongly on the applied stress, all the way down to zero at the low-temperature yield stress. The Nabarro equation gave the relation for this dependence and was particularly applicable when the obstacles to glide dislocations were localized, as in forest work hardening. Some characteristic features of plastic flow and creep, which resulted from this, were considered.

The Nabarro Equation for Thermally Activated Plastic Glide. A.H.Cottrell: Philosophical Magazine, 2006, 86[25-26], 3811-7