ON THE TEMPERATURE-DEPENDENCE OF THE FLOW-STRESS OF METALS AND SOLID-SOLUTIONS

The linear correlation between the logarithm of the CRSS (critical resolved shear stress) or of the yield stress in the case of polycrystals, and temperature, frequently encountered in representations of experimental data on metals and solid solutions, is shown to be consistent with the requirements of models in which kink-pair formation processes control the migration of dislocations. The main object of this paper is to show that this simple, 'semi-empirical', representation is theoretically justifiable, and to discuss its scope and limitations.