Dependence of dynamic yield stress of binary alloys on the dislocation density under high-energy impacts

The above-barrier motion of edge dislocations under high-energy impacts on binary alloys containing Guinier–Preston zones is theoretically analyzed. It is shown that in the case of high strain rate deformation of such alloys, the dependence of the yield strength on the dislocation density deviates from the Taylor relation and is a nonmonotonic function with a maximum. The position of the maximum corresponds to the density of dislocations, at which their contribution to the formation of the spectral gap becomes dominant.