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Erschienen in:
2016 | OriginalPaper | Buchkapitel
Strengthening Mg-Al-Zn Alloy by Repetitive Oblique Shear Strain
verfasst von : Toshiji Mukai, Hidetoshi Somekawa, Alok Singh, Tadanobu Inoue
Erschienen in: Magnesium Technology 2011
Verlag: Springer International Publishing
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Grain refinement is one of the possible ways to enhance the strength of magnesium without losing the ductility and/or toughness. In this study, severe plastic working by caliber rolling has been demonstrated to refine the grain structure of a commercial AZ31 Mg-Al-Zn alloy at a commercial processing speed. As a result, ultra-fine-grain structure with sub-grains in a sub-micro-meter scale was obtained. A simultaneous operation of oblique shear strain weakened the basal texture compared to that of the initial as-extruded alloy, and resulted in tensile ductility comparable to that of the commercially extruded alloy, and showed a higher asymmetry ratio of yield stress in compression/tension than that of the as-extruded alloy.