Computer simulation of recrystallisation and grain growth

AbstractA Monte Carlo computer simulation technique was employed to model the recrystallisation and subsequent grain growth of a heavily deformed metal. Seeds, from which recrystallised grains grow, were inserted in three different ways, namely, (i) uniformly, (ii) randomly over all the lattice sites, and (iii) randomly on the surfaces of grains that were present before deformation. It was assumed that all seeds were active from the start of the recrystallisation process. Various characteristics of the grains grownfrom seeds on grain surfaces were found to be very different from those of grains grown from seeds located throughout the material. In particular, the distribution of grain sizes is broader and individual grains are often elongated. By contrast, grains grown from seeds distributed throughout the material are equiaxed. However, these differences tend to be removed after recrystallisation is complete and normal grain growth occurs. The results have practical implications if the strength of the met...