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Journal of Materials Science
Erschienen in: Journal of Materials Science 11/2018

21.02.2018 | Metals

Elasticity and internal friction of magnesium alloys at room and elevated temperatures

verfasst von: Michaela Janovská, Peter Minárik, Petr Sedlák, Hanuš Seiner, Michal Knapek, František Chmelík, Miloš Janeček, Michal Landa

Erschienen in: Journal of Materials Science | Ausgabe 11/2018

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Abstract

Elastic moduli (Young’s modulus, shear modulus and bulk modulus) of three ultrafine-grained Mg-based alloys AZ31, AE42 and LAE442 were studied by resonant ultrasound spectroscopy. Evolution of these moduli and the corresponding high-frequency internal friction were measured in a temperature cycle between the room temperature and 310 °C, i.e., with heating above the recrystallization threshold temperature. The results reveal that the Li content in the LAE442 alloy has a strong impact on its elastic performance, resulting in a high E/ρ ratio, which is consistent with predictions of ab initio calculations. Simultaneously, the relaxation due to grain boundary sliding has significantly lower activation energy in LAE442 alloy.
Vorheriger Artikel Mechanical properties and failure behavior of AZ61 magnesium alloy at high temperatures
Nächster Artikel A semitopological mean-field model of discontinuous dynamic recrystallization

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Metadaten
Titel
Elasticity and internal friction of magnesium alloys at room and elevated temperatures
verfasst von
Michaela Janovská
Peter Minárik
Petr Sedlák
Hanuš Seiner
Michal Knapek
František Chmelík
Miloš Janeček
Michal Landa
Publikationsdatum
21.02.2018
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 11/2018
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-2136-4

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