Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 527, Issue 20, Pages 5092-5099Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2010.04.064
Keywords
Mg alloy; Equal-channel angular pressing; Precipitation; Strengthening; Nucleation and growth
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Funding
- Australian Microscopy & Microanalysis Research Facility (AMMRF) node at The University of Sydney
- Australian Research Council
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The use of high-temperature (330 degrees C) equal-channel angular pressing (ECAP) is demonstrated to promote precipitation of a fine and uniform dispersion of the FCC beta(1) phase in an Mg-Nd-Gd-Zn-Zr alloy. Significantly, this process induces a hardening reaction in the alloy, where isothermal ageing at this temperature leads only to softening. The evolution of microstructure is characterized using transmission electron microscopy and scanning electron microscopy. The nucleation and growth of precipitates during the high-temperature ECAP are discussed. This research highlights a new approach to engineer precipitate microstructures via the application of severe plastic deformation so as to extend the property space of high-temperature Mg alloys. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
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