Effects of thermal cycling on density, elastic modulus, and vibrational damping in an alumina particulate reinforced aluminum metal matrix composite (Al{sub 2}O{sub 3p}/2014 Al)
- Texas A and M Univ., College Station, TX (United States). Mechanical Engineering Dept.
- Univ. of Alabama, Birmingham, AL (United States). Dept. of Materials and Mechanical Engineering
- Univ. of Minnesota, Minneapolis, MN (United States). Dept. of Chemical Engineering and Materials Science
The effects of thermal cycling on the mechanical and physical properties, namely, the density, dynamic elastic modulus and vibrational damping, were measured for a particular reinforced metal matrix composite (MMC). The material was made by Duralcan. Specimens were exposed to up thermal cycles from room temperature to 300 C. The density of the material was measured by the Archimedes technique. The dynamic Young`s Modulus and vibrational damping of the material were determined by the piezoelectric ultrasonic composite oscillator technique (PUCOT). The results showed that the density and elastic modulus of the material increased only slightly due to the thermal cycling while the damping increased significantly. An increase in dislocation concentration near the particle/matrix interfaces caused by the thermal cycling could account for the measured results.
- OSTI ID:
- 687553
- Journal Information:
- Journal of Advanced Materials, Journal Name: Journal of Advanced Materials Journal Issue: 3 Vol. 31; ISSN 1070-9789; ISSN JADMEK
- Country of Publication:
- United States
- Language:
- English
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