Abstract

Compared with geological problems those encountered in understanding deformation texture (fabric) development in metals are fairly simple. The sample history is well documented, the material is usually single phase, any phase transformations have been at constant composition and the material has been 100 % dense throughout. For most technologically important metals the deformation occurs only by glide, for which lattice rotations causing preferred orientation development are readily analysed. The methods involved are given by Chin et al. 1966.

The most important case for study in metals is that of the texture developed in rolling, which, in its most common form as used to roll sheet and plate, involves plane strain conditions. For this process f.c.c, metals (e.g. Cu and Al) should, according to the analysis (Dillamore & Katoh 1972), develop textures in which the principal feature is a spread of orientations from (110) [1 12] to an orientation near to (211) [1 11] (the indices (11, 4, 4) [8, 11, 11] are a good description for the actual orientation found), while b.c.c, metals (notably Fe) should develop the principal spread (112) [ 110]–(8, 11, 11) [ 11, 4, 4]. It will be noted that the f.c.c, and b.c.c, textures are related by simply interchanging the indices denoting the rolling plate with those denoting the rolling direction. This is a direct consequence of the fact that the glide plane in the f.c.c, case is of the form {111} and the glide direction for b.c.c, metals of the form 〈111〉.

These textures are predicted

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