Manufacturing Technology 2015, 15(4):526-530 | DOI: 10.21062/ujep/x.2015/a/1213-2489/MT/15/4/526

Influence of Homogenization Annealing on Internal Damping Depending on the Vibration Amplitude Measured on Specimens AZ31 and AZ91

Zuzana Dresslerová, Peter Palček, Milan Uhríčik
University of Žilina, Faculty of Mechanical Engineering, Department of Material Engineering, Univerzitná 8215/1, 01026 Žilina, Slovakia

Damping capacity of alloys is closely tied to the presence of defects including solute atoms, second phases and voids. The interaction between moving dislocations and point defects is one of the major internal damping mechanisms of magnesium alloys so the precipitates influence the damping capacity and contribute to damping properties. The article is focused on the analysis of the internal damping changes depending on the amplitude of the magnesium alloys AZ31 and AZ91 in as cast state and after homogenization annealing. In experimental measurements only resonance method was used. This method is based on continuous excitation of oscillations of the specimen and the entire apparatus vibrates at a frequency which is near to the resonance. Starting resonance frequency for all measurements was about f = 20500 Hz.

Keywords: Magnesium alloys, Internal damping, Vibration amplitude

Published: September 1, 2015  Show citation

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Dresslerová Z, Palček P, Uhríčik M. Influence of Homogenization Annealing on Internal Damping Depending on the Vibration Amplitude Measured on Specimens AZ31 and AZ91. Manufacturing Technology. 2015;15(4):526-530. doi: 10.21062/ujep/x.2015/a/1213-2489/MT/15/4/526.
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