The cross slip of a dislocation in an ultrasound field and its dependence on the ultrasound amplitude and frequency,sample orientation,and dynamic viscosity

The motion of a screw dislocation under the action of ultrasound is simulated with account taken of its cross slip in a spatially nonuniform stress field created by a fixed dislocation of the same sense. Only dislocations started from certain regions in the space are shown to undergo cross slip. The variations in the sizes and shapes of these regions with the ultrasound parameters, crystallographic orientation of the sample, and coefficient of dynamic viscosity are given.