jet deposition;  6061Al/SiCP composite;  heat treatment;  Damping performance

606 1Al/SiCP metal matrix composites (MMC) were prepared by jet co-deposition method, and the effects of five heat treatment regimes on their microstructure and damping properties were studied. The results show that the internal consumption value of materials in different heat treatment states is basically the same at room temperature, while there are significant differences at high temperature. In the temperature range of 5 °C~100 °C, the order of damping capacity is: furnace cooling> air cooling>-270 °C quenching> as is>-70 °C quenching > water quenching; In the test temperature range (195 °C~30 °C), the modulus decreases monotonically with the increase of temperature, and increases with the increase of strain amplitude. At the same frequency, the internal friction value does not change with the amplitude of the strain.