The Nature of Texture Component Development in BCC Single Crystals

Abstract

Textural changes occurring in deformed BCC single crystals of (001)

Texture contribution to the anisotropy of physical properties

“…It is convenient to choose the so-called texture axes of the LFcs [SI as the Oz axes of these 'local' coordinate systems 193. The texture axis positions correlate with regions of abnormally high values of the pole density in some experimental pole figures [8,9]. The abnormally high maxima manifest themselves on the pole figures, the indices of which coincide with those of the crystallographic directions of the texture axes.…”

“…The u3-value determines the length of a region in orientation space with a constant orientation density. By such means one can simulate the so-called orientation tubes, which may be considered as LFC parts [8,9]. Hereafter any set of three Eulerian angles is determined as specified by Bunge [4]: the coordinate system is lirst rotated around the Oz axis, then around the new direction of the Ox axis, and finally once again around the Oz axis in its final position.…”

“…In this case each structure type may be attributed to a specific texture component. This correlation of orientation and structure can be established only if any texture component is considered as a limited fibre component (LFC), with an anisotropic spread with respect to the maximum [8,9]. ' The LFC concept was qualitatively proposed by Wassermann and Grewen [5] many years ago.…”

“…However, unlike the lasts the LFC dispersion may be given by a set of grain rotations with respect to some axis in a limited angular range less than 2?r. This approach h m s out to be very useful for the quantitative approximation of most experimental textures [8,9]. In our opinion, in the case of texture approximation by spherical distributions in such demarcation of structure elements over the texture components may be realized with difficulty and is less justified from a physical point of view.…”

“…In our opinion, in the case of texture approximation by spherical distributions in such demarcation of structure elements over the texture components may be realized with difficulty and is less justified from a physical point of view. Also, in the approach in [8,9] the texture is described by a much smaller number of parameters as in [1&12].…”