Damping capacity of in-situ TiC_p/2024 composites

摘要

The internal friction and the damping behaviors of in-situ TiC_p/2024 composites have been investigated in comparison with those of 2024 matrix alloy. The results showed that the damping properties of the TiC_p2024 composites are superior to those of the matrix alloy and increase with increasing temperature and volume fraction of TiC. It was found that the damping properties were sensitive to frequency and temperature, and the dislocation damping and interface damp- ing were the main factors which influence the damping behaviors of the composites. When the temperature was lower than 200deg.C, the dislocation damping was the main factor; when the temperature was higher than 200deg.C, the interface and boundary damping was the main factor.