Modelling mechanisms and microstructures of recrystallisation

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Abstract
This paper briefly reviews the various approaches, both analytical and numerical, that have been used to model the microstructural changes that occur during primary recrystallisation. For prediction of the kinetics of recrystallisation and the resulting grain structure, analytical methods based on the Avrami equation are still limited because of the complexity of the parameters in the equation. Numerical simulations based on a similar model show great promise, but are still not sufficiently sophisticated to accurately reproduce the grain size distributions found in practice. Monte Carlo simulations, which can successfully model grain growth after recrystallisation, have been used to model recrystallisation but cannot as yet be performed on a large enough scale to take into account the complexity of the deformed structure. A preliminary account is given of a new network model which aims to model recrystallisation mechanisms by simulating subgrain boundary migration. MST/1597