MODELING OF GRAIN-BOUNDARY MISORIENTATION SPECTRUM IN POLYCRYSTALS WITH CRYSTALLOGRAPHIC TEXTURE

Modelling of grain boundary misorientation distribution in polycrystals having crystallographic texture has been carried out taking into account the correlation in the orientation of adjacent grains. It is shown that the distribution of misorientations in any plane section is representative for the entire sample. It is established that the distribution of grain boundaries by misorientations is essentially dependent on texture. However, texture as it is does not unambiguously determine the grain boundary spectrum; different grain boundary misorientation distributions can correspond to one and the same texture depending on the correlation in the orientations of adjacent grains. The correlation depends on two factors: a method of distinguishing "specified" and "calculated" boundaries and a misorientation spectrum of "specified" boundaries. The misorientation distribution is shown to be virtually independent of the former factor and essentially dependent of the latter.