Dislocation multiplication under the effects of ultrasound, and the evolution of dislocation loops generated by a dislocation source, were studied using computer modelling techniques. Conditions were determined under which the generation of loops occurred by means of both classical or non-traditional mechanisms. Relationships were established between the ultrasonic frequency and the coefficient of dynamic viscosity on the one hand, and critical parameters such as the dislocation source length, stress amplitude and stress interval within which the new mechanism operated, on the other. Conditions were determined under which dislocations, generated by non-traditional mechanisms, could accumulate.

Multiplication of Dislocations in an Ultrasonic Field. O.V.Bubnovskaya, D.L.Legotin, N.A.Tyapunina: Moscow University Physics Bulletin, 1997, 52[6], 68-73