Abstract
A mathematical model of plastic deformation of dispersion-hardened materials with FCC matrix and strengthening particles having various coupling with the matrix is presented. The model is based on the equations of balance of strain-induced defects of various types with allowance for their transformation in the process of plastic deformation. The influence of scale characteristics of the strengthening phase, temperature, and strain rate on the evolution of the dislocation subsystem and on strain hardening of an alloy with FCC matrix is investigated. Strain hardening is observed in materials with nanosized strengthening phase that is more intense than in materials with larger particles, independent of phase coupling with the matrix, for the same volume fraction of the strengthening phase.
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