Texture and anisotropy of polycrystalline materials Properties of textured materials

This article completes a series of three devoted to crystallographic textures in polycrystalline materials. After the article on techniques and methods for describing textures [M 3 040] , the one on the mechanisms of texture formation [M 3 041] , this one aims to study the properties of materials possessing crystallographic texture. Texture, along with other structural parameters such as grain boundaries, can strongly influence the properties of polycrystalline materials. In fact, material properties depend on multiple parameters, such as crystal structure, phase chemistry, crystal orientation and lattice defects. This article deals only with the influence of crystalline orientation on material properties, i.e. the effect due to texture and high-order textural quantities, the other possible influences being taken for granted. Crystalline orientation influences material properties via crystalline anisotropy: dependence of properties on crystallographic direction. Manufacturers are particularly interested in the mechanical properties that determine behavior during forming and serviceability. However, the properties of polycrystalline materials are not the simple arithmetic averages of the properties of single crystals. Single-crystal grains, which are the elementary constituents of the material, are not independent of each other, but rather correlated by the polycrystalline edifice as a whole. The average physical property includes all influences related to the structure of the polycrystalline edifice.

At the end of the article, readers will find a table of the symbols used.