The slip process during yield-point deformation

Abstract

When Frank-Read dislocation sources are pinned by solute atoms, the mode of dynamic operation of the source is altered. In particular the source may be activated even though the yield-point stress is as much as 15 per cent lower than the critical operating stress of the source, and, further, the number of dislocation loops per burst is strongly dependent on the relative magnitudes of yield stress and critical stress. A qualitative application of these results to the yield-point phenomenon is made.