Table of Contents
Textures and Microstructures
Volume 26–27

Towards Three-Dimensional Modelling of Subgrain Coalescence

Agder College, Faculty of Engineering, Grimstad N-4890, Norway

Received 18 January 1996

Copyright © 1996 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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.