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Amplitude Dependent Internal Friction in a Mg-Al-Zn Alloy Studied after Thermal and Mechanical Treatment

1
Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16 Praha 2, Czech Republic
2
COMTES FHT, Průmyslová 996, 334 41 Dobřany, Czech Republic
*
Author to whom correspondence should be addressed.
Metals 2017, 7(10), 433; https://doi.org/10.3390/met7100433
Received: 11 July 2017 / Revised: 3 October 2017 / Accepted: 12 October 2017 / Published: 17 October 2017
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Abstract

The amplitude-dependent internal friction of continuously-cast and rolled AZ31 magnesium alloy was measured in this study. Samples were annealed and quenched step by step; immediately after the treatment, the amplitude dependence of the logarithmic decrement was measured. Changes in the microstructure due to thermomechanical treatment were reflected in changes in the damping. Internal friction is influenced by the dislocation substructure and its modification due to solute atoms migration, microplastic deformation, and twins’ formation. Internal friction in the rolled sheets is affected by the rolling texture. View Full-Text
Keywords: internal friction; magnesium alloy; thermal cycling; dislocations; twinning internal friction; magnesium alloy; thermal cycling; dislocations; twinning
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Trojanová, Z.; Lukáč, P.; Džugan, J.; Halmešová, K. Amplitude Dependent Internal Friction in a Mg-Al-Zn Alloy Studied after Thermal and Mechanical Treatment. Metals 2017, 7, 433.

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