期刊
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷 527, 期 20, 页码 5092-5099出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2010.04.064
关键词
Mg alloy; Equal-channel angular pressing; Precipitation; Strengthening; Nucleation and growth
类别
资金
- Australian Microscopy & Microanalysis Research Facility (AMMRF) node at The University of Sydney
- Australian Research Council
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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