Damping Behavior and Mechanism of Graphite and Al2O3 Particles Reinforced Al Matrix Composites

Abstract:

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The graphite and alumina particles reinforced Al matrix composites with graphite up to 5 vol% was prepared by Reciprocating Extrusion (RE). Damping behavior of the composites was measured by dynamic mechanical thermal analyzer. The composites showed more excellent damping Q-1 than pure Al manufactured by RE, and the ambient value was 9.9×10-3 at 5 Hz when the strain amplitude was 8×10-8. The damping behavior of the composites showed slight variation with frequency. The damping capacity increased with increasing of the strain amplitude when the amplitude less than 1.5×10-6, and then became a constant and independent of strain amplitude. The high damping capacity was attributed to micro-sliding interface damping and the dislocation damping.

Info:

Periodical:

Edited by:

Jing Tao Wang

Pages:

225-229

DOI:

10.4028/www.scientific.net/MSF.682.225

Citation:

Z. M. Zhang and B. Hu, "Damping Behavior and Mechanism of Graphite and Al2O3 Particles Reinforced Al Matrix Composites", Materials Science Forum, Vol. 682, pp. 225-229, 2011

Online since:

March 2011

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$35.00

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