Original title: Effect of aluminum content and precipitation on the corrosion behavior and acoustic emission response of AZ31 and AZ80 magnesium alloys
Authors: Veverková, E. ; Knapek, Michal ; Minárik, P.
Document type: Papers
Conference/Event: Metal 2019 - 28th International Conference on Metallurgy and Materials, Brno (CZ), 20190522
Year: 2019
Language: eng
Abstract: In this study, we investigated the effect of aluminum content and precipitation on the corrosion behavior of the AZ31 and AZ80 magnesium alloys. The investigated alloys were received in the as-extruded condition in order to retain comparable grain size and texture. First, solid solution treatment was performed on the samples of both alloys. Subsequently, the samples were isothermally aged at 200 degrees C for 20 hours. The scanning electron microscopy was used to study the grain size and microstructure. The corrosion properties of samples were studied by potentiodynamic polarization measurements and the AE signal was concurrently recorded. Solution treated AZ80 and AZ31 samples exhibited similar behavior. The aged AZ80 sample showed lower corrosion rate. Also, a strong breakdown appeared in the later (compared to other samples) stage of the potentiodynamic test. The breakdown was found to be easily recognized by AE parameters.
Keywords: acoustic emission; corrosion; Magnesium alloys; polarization
Project no.: EF16_013/0001794
Funding provider: GA MŠk
Host item entry: METAL 2019 - 28th International Conference on Metallurgy and Materials, Conference Proceedings, ISBN 978-80-87294-92-5

Institution: Nuclear Physics Institute AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0309634

Permalink: http://www.nusl.cz/ntk/nusl-438245


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