【摘要】 采用喷射共沉积方法制备了 6 0 6 1Al/SiCp 金属基复合材料 (MMC) ,研究了 5种热处理制度对其阻尼性能的影响。结果表明 :不同的热处理状态材料 ,常温下其阻尼基本没有变化 ,高温下阻尼则显著不同 ,在 10 0～ 2 70℃温度范围内 ,阻尼能力的大小顺序为炉冷 >空冷 >- 70℃淬火 >原样 (挤压态 ) >- 195℃淬火 >水淬 ,且超过180℃时 ,所有试样的阻尼能力均可达到 1× 10 -2 以上 ;在本研究的温度和应变振幅测试范围内 ,模量随温度的升高表现为单调下降 ,相同频率下的内耗值不随应变振幅变化。更多还原

【Abstract】 Influence of different heat treatments on the damping properties of the 6061Al/SiC p MMC fabricated by spray atomization and deposition was studied. The results show that damping value changes slightly at low temperature but remarkably at elevated temperature. At 100 ～ 270?℃, the damping capacity rank from great to small as follows: sample cooled in furnace, sample cooled in the air, sample quenched at -70?℃, sample without heat treatment, sample quenched at -195?℃ and sample quenched in water. In addition, the damping capacities of all the samples can be above 1×10 -2 when temperature is above 180?℃. Within the range of measuring temperature and strain amplitude, the shear modulus decline monotonously as temperature rises, and damping values don’t change with the strain amplitude at the same frequency.更多还原