Table of Contents
Textures and Microstructures
Volume 28 (1996), Issue 1-2, Pages 105-120
http://dx.doi.org/10.1155/TSM.28.105

Effect of Orientation Correlation on the Elastic Constants of Polycrystalline Materials

1Institute of Theoretical Physics B, Technical University of Clausthal, Germany
2Department of Physical Metallurgy, Technical University of Clausthal, Germany

Received 2 April 1996

Copyright © 1996 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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.