Contribution of point defects to the temperature anomaly of the yield stress in single crystals of the Ni$_3$Ge alloy

The temperature dependence of the yield stress $\tau_*$ Ni$_3$Ge single crystals is studied. The temperature dependence $\tau_*(T)$ in the high-temperature region (above 420 K) is found to be conditioned by thermally activated accumulation of the density of non-screw components of superdislocations. Interaction of point defects with edge dislocations and its effect on the temperature anomaly of the yield stress in Ni$_3$Ge single crystals are analyzed. The calculated results are found to agree with experimental data.