Abstract
In this paper, the motion of dislocations in the field of solute atoms which also move in the lattice is analysed. Solute atoms influence the dislocation velocity and the friction stress. The proposed model enables to explain the dynamic strain ageing phenomena such as the occurrence of the plateau stress, the appearance of plastic instabilities and anomalies in the stress dependence of the strain rate sensitivity of the flow stress.

Key words
dislocation, friction stress, plastic instabilities

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