A numerical method of simulation of evolution of complex precipitates in multiphase multicomponent systems is suggested. This method is based on the mean field approximation for the description of evolution of the pre-existing particles and on the classical theory of nucleation for calculation of the rate of formation of new nuclei. It takes into account the polydispersity of precipitate ensembles and can be used at all the stages of precipitates evolution, namely, nucleation, growth, dissolution, coarsening and transition stages between the growth or dissolution and coarsening. The application of this method is demonstrated by an example of carbonitrides evolution in low-carbon steel doped with Ti and Nb.Keywords: Precipitate evolution; computer simulation; nucleation; multicomponent system
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