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Metals 2018, 8(8), 644; https://doi.org/10.3390/met8080644

Characterization of Deformation Mechanisms in Mg Alloys by Advanced Acoustic Emission Methods

1
Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16 Prague 2, Czech Republic
2
Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232 Villigen, Switzerland
3
The Czech Academy of Sciences, Nuclear Physics Institute, Řež 130, 250 68 Řež, Czech Republic
*
Author to whom correspondence should be addressed.
Received: 31 July 2018 / Revised: 14 August 2018 / Accepted: 14 August 2018 / Published: 16 August 2018
(This article belongs to the Special Issue Advances in Acoustic Emission Testing of Metals and Alloys)
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Abstract

Adaptive sequential k-means (ASK) analysis of acoustic emission (AE) data was used to analyze the sources of AE during compression of three AZ31 magnesium samples with different initial texture. The results were compared to the classical hit-based approach. Observation of the deformed microstructure shows that the ASK analysis can distinguish very well between the signal originating in deformation twinning and dislocation slip. Moreover, together with microstructural analysis, the ASK algorithm revealed another source of AE for one of the samples, which was shown to be the double twinning. View Full-Text
Keywords: acoustic emission; magnesium alloys; twinning; dislocation slip; ASK analysis; EBSD acoustic emission; magnesium alloys; twinning; dislocation slip; ASK analysis; EBSD
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Čapek, J.; Knapek, M.; Minárik, P.; Dittrich, J.; Máthis, K. Characterization of Deformation Mechanisms in Mg Alloys by Advanced Acoustic Emission Methods. Metals 2018, 8, 644.

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