Journal
SCRIPTA MATERIALIA
Volume 64, Issue 9, Pages 880-883Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.01.023
Keywords
High-pressure torsion; Ultrafine grained microstructure; Severe plastic deformation; Hydrogen storage; Magnesium
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Funding
- Japan Society for Promotion of Science (JSPS)
- Light Metals Educational Foundation of Japan
- MEXT, Japan
- Kyushu University
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Pure Mg (99.9%) is processed by high-pressure torsion (HPT) at room temperature. The hardness behavior with imposed strain is similar to pure Al (99.99%), having a hardness maximum followed by a steady state. HPT processing increases the hardness and tensile strength. A bimodal microstructure with an average grain size of similar to 1 mu m is developed by HPT with some grains free of dislocations. Hydrogen absorption is improved by HPT after 10 revolutions, and a total hydrogen absorption of 6.9 wt.% is achieved. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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