In Situ Detection of Surface Micro-Cracking in Ultrafine-Grained AZ31 Magnesium Alloy by Resonant Ultrasound Spectroscopy

Hanuš S. Seiner; Petr Sedlák; Lucie Bodnárová; Michal Landa; Jitka Stráská; Miloš Janeček

doi:10.4028/www.scientific.net/KEM.606.87

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 606In Situ Detection of Surface Micro-Cracking in...

In Situ Detection of Surface Micro-Cracking in Ultrafine-Grained AZ31 Magnesium Alloy by Resonant Ultrasound Spectroscopy

Abstract:

Resonant ultrasound spectroscopy (RUS) was applied to monitor the micro-cracking process occurring during cooling at polished surfaces of an ultrafine-grained AZ31 magnesium alloy. It was observed that although the net of micro-cracks covered only narrow regions along the edges of the sample, its appearance resulted in a strong increase of the attenuation of the free elastic vibrations, and was, thus, sensitively detectable from the evolution of the RUS resonant spectra with temperature. This approach enabled a reliable determination of the threshold temperature for micro-cracking.

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Periodical:

Key Engineering Materials (Volume 606)

Pages:

87-90

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.606.87

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Online since:

March 2014

Authors:

Hanuš S. Seiner*, Petr Sedlák, Lucie Bodnárová, Michal Landa, Jitka Stráská, Miloš Janeček

Keywords:

Equal-Channel Angular Pressing (ECAP), Internal Friction, Magnesium Alloy, Micro-Crack, Resonant Ultrasound Spectroscopy

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