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

Modelling of two types of crystallographic texture corresponding to co ld-rolled material (so-called copper type texture) and to completely r ecrystallized material (cubic texture) has been performed for hypothet ical FCC metals. Orientation distribution functions (ODFs) of these tw o states differ considerably in both the position and intensity of tex ture maxima. These model ODFs have been used as input parameters for s imulation of basic grain boundary (GB) misorientation spectra. It has been established that the texture of copper causes little difference i n basic on misorientation spectra as compared with a textureless polyc rystal. Apparently, in materials with such a texture, the GB spectrum is primarily determined by correlations in orientations of adjacent gr ains. In contrast, the cubic texture has a great influence on basic sp ectra, and they are significantly different from spectra in a texturel ess polycrystal. For this type of texture, the GB spectrum is determin ed by both the texture and the correlation between orientations of nea rest-neighbour crystallites.