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Routes to Develop Fine-Grained Magnesium Alloys and Composites for High-Strain Rate Superplasticity

  • Toshiji Mukai (a1), Hiroyuki Watanabe (a1), T. G. Nieh (a2) and Kenji Higashi (a3)

Abstract

Superplastic properties of magnesium alloys and their composites were reviewed with a special emphasis on the achievement of high strain rate superplastic forming. The role of grain size on superplastic deformation mechanisms was particularly addressed. Commercial Mg-Al-Zn alloys and a ZK60-based composite are used as model materials to illustrate the underlining principles leading to the observation of high strain rate superplasticity. In this paper, experimental results from several processing routes, including thermomechanical processing, severe plastic deformation, and extrusion of machined chips and rapidly solidified powders, are presented. High strain rate superplasticity (HSRS) is demonstrated in ZK60-based composites.

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Routes to Develop Fine-Grained Magnesium Alloys and Composites for High-Strain Rate Superplasticity

  • Toshiji Mukai (a1), Hiroyuki Watanabe (a1), T. G. Nieh (a2) and Kenji Higashi (a3)

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