Abstract
Hu (1962, 1963) suggested that the nucleation process during recrystallisation can arise from subgrain coalescence. In the present paper, a new modelling approach has been presented for subgrain rotations. It is suggested that the required mass transfer due to compatibility criteria, can be modelled as geometric friction forces. By employing this new concept, it has been shown that three-dimensional models can be derived, based on classical mechanics. The derived model has shown-that the small and regular subgrains are the most likely candidates for rotation. Subgrain coalescence is strongly temperature dependent since diffusion of vacancies are required for the rotation.