| Title |
Composite Materials : Effects of Reinforcements on Damping Capacity of Cast Al-Si Composites |
| Authors |
이성학(Sung Hak Lee),이동근(Dong Geun Lee),고성현(Seong Hyun Ko),김석수(Suk Soo Kim) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Abstract |
The present study was concerned with the effects of reinforcements on damping capacity in cast Al-Si composites. Bending vibration tests were conducted on A356 alloy, Al-SiCp composites, and Al-SiCp-C composites using impulse-frequency response techniques, and their damping capacity and elastic modulus were evaluated. The test results indicated that the damping capacity was increased in the order of the A356 alloy, Al-SiCp composites, and Al-SiCp-C composites. Particularly in the Al-SiCp-C composites, the addition of 4 vol.% graphites was very effective on the enhancement of damping capacity, while SiC particulates contributed to the improvement of hardness and strength. The elastic moduli calculated from the Euler-Bernoulli beam theory for the A356 alloy and the composites were matched well with the measured moduli within the error range of 3~7%. |