A COMPUTER-SIMULATION STUDY OF THE RELATION BETWEEN GRAIN-BOUNDARY MISORIENTATION DISTRIBUTION AND CRYSTALLOGRAPHIC TEXTURE

Modelling of two types of crystallographic texture corresponding to cold-rolled material (so-called copper type texture) and to completely recrystallized material (cubic texture) has been performed for hypothetical FCC metals. Orientation distribution functions (ODFs) of these two states differ considerably in both the position and intensity of texture maxima. These model ODFs have been used as input parameters for simulation of basic grain boundary (GB) misorientation spectra. It has been established that the texture of copper causes little difference in basic on misorientation spectra as compared with a textureless polycrystal. Apparently, in materials with such a texture, the GB spectrum is primarily determined by correlations in orientations of adjacent grains. In contrast, the cubic texture has a great influence on basic spectra, and they are significantly different from spectra in a textureless polycrystal. For this type of texture, the GB spectrum is determined by both the texture and the correlation between orientations of nearest-neighbour crystallites.