2016 | OriginalPaper | Buchkapitel
Improvement in the Characterization of the 2099 Al-Li Alloy by FE-SEM
verfasst von : Nicolas Brodusch, Michel L. Trudeau, Pierre Michaud, Mathieu Brochu, Lisa Rodrigue, Julien Boselli, Raynald Gauvin
Erschienen in: ICAA13 Pittsburgh
Verlag: Springer International Publishing
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This paper describes how state-of-the-art Field-Emission Scanning Electron Microscopy (FE-SEM) can contribute to the characterization of the 2099 aluminum-lithium alloy, and metallic alloys in general. Investigations were carried out on bulk and thinned samples. BSE imaging at 3kV and STEM imaging at 30kV along with highly efficient microanalysis permitted to correlate experimental and expected structures. Although our results confirm previous studies, this work points out possible substitutions of Mg and Zn with Li, Al and Cu in the T1 precipitates. Zinc and magnesium are also present in “rice grain” shaped precipitates at the grain boundaries. The versatility of the FE-SEM is highlighted in that it can provide information at the macro and micro scales with relevant details. Its ability to probe the distribution of precipitates from nano-to micro-sizes throughout the matrix makes Field-Emission Scanning Electron Microscopy a suitable technique for the characterization of metallic alloys.