Abstract
Mg single crystals with three different crystallographic orientations have been channel die (plane strain) compressed at applied rate of 10−3s−1 and at room temperature. The concurrent acoustic emission (AE) measurement was used as a method to analyze the dislocation dynamic during plastic deformation of Mg single crystals. The AE count rate and the maximum amplitudes of the AE event were correlated with stress-strain curves to determine the activity of various deformation mechanisms. The presence of large AE signals in the first stage of plastic deformation in single crystals with favorable orientation for (10.2)-twinning indicates twin nucleation and subsequent decrease of the AE activity, which can be connected with twin growth and collective dislocation processes. Compression along the c-axis (hard deformation mode) produces almost no AE activity.
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Drozdenko, D., Dobroň, P., Knapek, M., Letzig, D., Bohlen, J., Chmelík, F. (2014). Acoustic Emission Analysis of Plane Strain-Compressed Mg Single Crystals. In: Alderman, M., Manuel, M.V., Hort, N., Neelameggham, N.R. (eds) Magnesium Technology 2014. Springer, Cham. https://doi.org/10.1007/978-3-319-48231-6_22
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DOI: https://doi.org/10.1007/978-3-319-48231-6_22
Publisher Name: Springer, Cham
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