Volume 1 (1972), Issue 1, Pages 17-29

Texture Control and the Yield Anisotropy of Plane Strain Magnesium Extrusions

1Bisra, Corporate Laboratories of BSC, Hoyle Street, Sheffield S3 7EY, UK
2Department of Physical Metallurgy, University of Birmingham, Edgbaston, Birmingham 15, UK
3Clayton Dewandre Ltd., No. 3 Factory, Outer Circle Drive, Lincoln, UK

Received 13 September 1971

Copyright © 1972 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.


The textures developed in magnesium, annealed after both hot and cold extrusion under essentially plane strain conditions, have been qualitatively accounted for in terms of the operative deformation modes. It is found that the main features of both textures are explained by the operation of {101¯2} and {101¯1} twinning together with basal slip, but there is an important component of the hot extrusion annealing texture not found in the cold extrusions texture which can only be explained by the action of {101¯0} or {101¯1} slip.

The strength of the extruded and annealed material has been studied under various stress systems and initial yield loci have been plotted. Complete crystal orientation distribution functions were used to compute theoretical yield loci for comparison with the experimental results in order to assess the possibility of relating texture and properties in hexagonal metals. It was found that the theory gave remarkably good agreement with experiment. The assumptions made and the terms under which they apply are discussed.