Empirical evaluation of electron and phonon drag coefficients for dislocations in Pb- and Al-based alloys

The impurity concentration dependence of the temperature threshold of low-t emperature anomalies of plasticity associated with the influence of inertia l effects on the dislocation mobility is analyzed using the experimental da ta on the kinetics of plastic flow in five lead- and aluminum-based fcc sol id solutions. It is shown that the results of such an analysis can be used for evaluating the electron and phonon drag coefficients for dislocations i n these metals and to derive an empirical expression for the temperature de pendence of phonon drag in the low-temperature range. (C) 1999 American Ins titute of Physics.