Texture Evolution of Magnesium Single Crystals Deformed by High-Pressure Torsion

Abstract:

Single crystals of technical purity Magnesium (99.8 wt.%) of initial orientations [ ] 2 1 10 and [ ] 2 2 11 were subjected to HPT deformation at room temperature up to strains of 10. The microstructural evolution has been analyzed by X-ray microtexture investigations and by in-situ stress-strain measurements. The results can be described in terms of shear arising from HPT deformation and - with higher strains - in terms of recrystallization. In crystals with hard orientation[ ] 2 2 11 , these features occur at smaller strains than in crystals with soft orientation [ ] 2 1 10 , i.e. with higher symmetry. In general, the observed textures and strength variations are much stronger than those reported for fcc HPT deformed metals.

• Periodical: Materials Science Forum (Volumes 584-586)
• Pages: 263-268
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.584-586.263
• Online since: June 2008
• Authors: Bartlomiej J. Bonarski, Erhard Schafler, Borys Mikułowski, Michael Josef Zehetbauer
• Keywords: Hard Orientation, High Pressure Torsion (HPT), Magnesium, Shear Deformation, Single Crystal, Soft Orientation, Stress-Strain Characteristics, Texture

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