SIMULATION OF RECRYSTALLIZATION BY CELLULAR AUTOMATA

A cellular automata (CA) model for recrystallization is introduced. Its behaviour is investigated under the influence of different model parameters and algorithms that simulate the kinetics of nucleation and growth of recrystallizing grains. The rate of released energy is calculated by the CA-model so that comparisons with calorimetric measurements are possible. The CA-model gives the same results as the theory of Johnson, Mehl, Avrami and Kolmogorov (JMAK) for the same model assumptions. Systematic deviations of experimental data from the JMAK-theory are simulated by special model assumptions of the CA. This leads to good agreement with experimental data. It is shown that the CA-model is easy to handle, very simple in the basic algorithm and extremely flexible for introducing special model assumptions.