On the influence of orientation pinning on growth selection of recrystallisation

摘要

With the help of techniques for local orientation determination it has been proved that the recrystallisation textures of Al-alloys evolve by a preferred formation of some orientations at characteristic nucleation sites and a subsequent growth selection of distinct orientations out of this spectrum of nucleus orientaions. As an alternative to the standard explanation of a favoured growth of grains with a spectrum of nucleus orientation relationship to the deformed matrix(e.g. 40 deg <111>), recently the concept of "orientation pinning" has been proposed, which considers that the growth selections is determined by special orientation relationships being disfavoured(low-angle and twin grain boundaries).