Phenomenological theory of low temperature creep with account of several types of dislocation transformations

A generalization is given for the earlier proposed scheme of describing plastic deformation for the case of low-temperature creep. Dislocation ensembles containing several types of mobile and immobile dislocations are considered. Conditions are investigated under which one transformation dominating at a certain stage is singled out of the many dislocation transformations. The form of the creep curves turns out to be substantially different, depending on whether the dislocation families interact with each other strongly or weakly. The strain rate increments due to the rapid variation of stress or temperature are calculated. [Russian Text Ignored].