[SY-I7] Symposium I-7

[SY-I7] Insights into recrystallisation: atomistic simulations of the properties of grain boundaries in heavily deformed material

Invited

^○Chris P Race (University of Manchester, UK)

A critical process in the development of a desirable microstructure in polycrystalline metals is that of recrystallisation, in which new grains of defect-free material nucleate and grow within the defect-laden microstructure of deformed material.

Thus, recrystallisation involves the creation and migration of grain boundaries between pristine and highly defective crystal. The structure and properties of these grain boundaries will be strongly affected by the plastic deformation in the defective grain. Furthermore, the driving force for their migration will be the elimination of the deformation defects. This force will be larger in magnitude and different in character to the driving forces present in other cases of grain boundary migration, such as grain growth. Grain boundary properties under these conditions have, however, received comparatively little attention.

Here we present insights from atomistic models of grain boundaries between cold-worked and defect-free grains which begin to uncover trends in their static and dynamic properties under conditions of recrystallisation.