Metallurgical Characterization of the Interfaces and the Damping Mechanisms in Metal Matrix Composites.
Progress rept. no. 1, 4 Feb 84-12 Jun 85,
MARTIN MARIETTA AEROSPACE DENVER CO
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Metal matrix composites are candidate structural materials for space applications. Large structures in space encounter natural and hostile disturbances, which introduce vibrations of a broad spectrum of frequencies. These vibrations must be damped fast enough for effective maneuverability and dynamic dimensional precision. In the vibrational control designs of such structures, damping capacity of the structural material is a significant parameter. If metal matrix composites arte to be used for space structures their intrinsic damping behavior needs to be clearly understood and improved if necessary, through metallurgical modifications. In this report, a graphite-aluminum composite has been selected to study the microstructural features and mechanisms responsible for dissipating vibrational energy. The objectives of this program were Development of a reliable test technique to accurately measure the damping capacity of metal matrix composites Metallurgical characterization of the interface structures Investigate the damping mechanism in metal matrix composites and Recommend microstructural modifications to enhance damping in metal matrix composites.
- Laminates and Composite Materials