Damping Capacities of Mg–(0–9)%Sn Casting Alloys

Abstract

This study aimed to investigate the damping capacities of Mg–(0–9)%Sn casting alloys. An increase in the Sn content led to an increase in the Sn-rich area and the volume fraction of Mg₂Sn phase, and to a decrease in the damping levels both in the strain-amplitude-independent and strain-amplitude-dependent regions. The evaluation of the microstructural evolution indicates that the higher Sn solute concentration in the α-Mg matrix and the increased number density of Mg₂Sn precipitates are responsible for the deterioration of the damping capacities in the strain-amplitude-independent and strain-amplitude-dependent regions, respectively.