The effect of rolling reduction on the microstructure, mechanical and damping properties of Mg-1 wt.%Al alloys

High temperature and high strain rate rolling of Mg-1 wt.%Al alloy at 20%, 50%, and 80% rolling reduction were used to investigate the effect of rolling reduction on the microstructure, mechanical and damping properties of Mg-1 wt.%Al alloy. The average grain size of Mg-1 wt.% Al sheet gradually decreases, and the DRX volume fraction, dislocation density, and texture strength gradually increase with the increase of rolling reduction. At 80% rolling reduction, the average grain size is 8.8 μm, and the ultimate tensile strength, tensile yield strength, and elongation of Mg-1 wt.% Al sheet gradually increases. The finest room temperature damping properties are shown by plates with a 50% reduction in mean dislocation density and grain size, where the damping value Q-1 for ε0.1 is 0.060. The damping properties in the temperature damping spectrum grow with increasing reduction at a certain frequency. When the rolling reduction is certain, the damping performance decreases as the frequency increases.