Microstructural dynamics of primary and secondary recrystallization

Abstract

Monte Carlo computer simulation techniques have been applied to the problem of recrystallization in a two dimensional matrix. Both primary and secondary recrystallization are investigated. Primary recrystallization is modelled under conditions where the degree of stored energy is varied and nucleation occurs either continuously as a function of time or as site saturated. The degree of stored energy is adjusted to range from heterogeneous nucleation at grain edges and corners to homogeneous nucleation throughout the microstructure. Secondary recrystallization is modelled: (a) where the driving force is provided solely by curvature and (b) where the driving force is provided by the difference in the solid-vapor surface energy between grains of different crystallographic orientation. The role of particles in initiating secondary recrystallization is also addressed. The microstructure and kinetics for the different recrystallization processes are discussed and compared.