Abstract
The temporal evolution of microstructure during thermomechanical processing of steels is simulated by Monte Carlo simulation techniques. In the simulation of normal grain growth, the anisotropy of the grain boundary energy is incorporated into the model. Compared with the case in which no anisotropy of boundary energy is assumed, the suppression of grain growth was observed and the grain size distribution became broad. The effect of dispersed particles on growth kinetics is also studied by the model. The simulation of restoration kinetics after hot deformation is conducted by a model which incorporates the effect of stored energy by deformation into the free energy term. The difference of site energies between austenite and ferrite is incorporated into the free energy of the system in the simulation of austenite to ferrite phase transformation. Nucleation of proeutectoid ferrite was observed to predominate the progress of transformation in the initial stage and ferrite grain growth became dominant in the subsequent stage.
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