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Chemistry of nanoscale precipitates in Mg–2.1Gd–0.6Y–0.2Zr (at.%) alloy investigated by the atom probe technique

The precipitation sequence of a Mg–2.1Gd–0.6Y–0.2Zr (at.%) alloy at 200 °C was investigated by transmission electron microscopy (TEM), and the chemical compositions of the precipitates observed in different stages of the sequence were analyzed by the three-dimensional atom probe (3DAP) technique. Th...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2005-03, Vol.395 (1), p.301-306
Main Authors: Honma, T., Ohkubo, T., Hono, K., Kamado, S.
Format: Article
Language:English
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Summary:The precipitation sequence of a Mg–2.1Gd–0.6Y–0.2Zr (at.%) alloy at 200 °C was investigated by transmission electron microscopy (TEM), and the chemical compositions of the precipitates observed in different stages of the sequence were analyzed by the three-dimensional atom probe (3DAP) technique. The precipitation sequence is described as supersaturated solid solution (SSS) → β″ (D0 19 Mg 3X) → β′ (bco Mg 15X 3) → β phase (Mg 5X). There are structural similarities in each phase and the phase evolution occurs continuously by decreasing the rare earth content when β″ transforms to β′.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2004.12.035