Damping Behavior of Metal Matrix Composites,
Abstract
Discontinuous and continuous fiber reinforced composites were evaluated for their damping capacities and elastic moduli. In the case of graphite/aluminum and graphite/magnesium, the damping factor increases significantly in the transverse direction and slightly in the longitudinal direction whereas the longitudinal elastic modulus of the composite has increased by a factor of 3 or more. The damping behavior of the SiC particulate reinforced aluminum composite was similar to that of the matrix aluminum alloy. Efforts were made to explain the observed behavior to the fiber matrix and the diffusion bonded interfaces present in these composites. If the interface strength is higher than that of the matrix alloy, the damping capacity remains the same. However, if the interfaces are the weaker areas, i.e., areas of metallurgical imperfection, the damping capacity increases. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1984
- Accession Number
- ADP004704
Entities
People
- M. S. Misra
- P. D. Lagreca
Organizations
- Martin Marietta