Abstract
The macroscopic elastic properties of a polycrystalline aggregate depend on the elastic anisotropy of its crystallites and on the texture. Besides that, also geometrical structure parameters have an influence which is confined within the Voigt- and Reuss-averages as upper and lower bounds. These geometrical parameters are grain sizes, grain shapes, and mutual arrangement of grains e.g. number of neighbours and orientation correlation. In the present paper this latter influence, i.e. orientation correlation was studied by model calculations based on a cluster model described earlier. It was found that “low-angle-correlation” leads to higher elastic stiffness and “high-angle-correlation” results in elastically “softer” materials compared with the uncorrelated arrangement of the same crystal orientations in the aggregate.