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

Zhong Ming Zhang; Bo Hu

doi:10.4028/www.scientific.net/MSF.682.225

Paper Titles

Compression Superplasticity of Ultrahigh Carbon Steel in Electric Field
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Effects of ECAE and Aging on Phase Transformations and Superelasticity of a Ni-Rich TiNi SMA
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Microstructures and Mechanical Properties of Fcc Pure Metals with Different Stacking Fault Energies by Equal Channel Angular Pressing
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Microstructure and Properties of Ultrafine-Grained Steel Produced by Warm Compression of Martensite
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Improvement of Strength of Mg-12Gd-3Y-0.5Zr Alloys Processed by Combination of ECAP and Extrusion
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Erosion Wear Property of Surface Diffusion Alloyed Coatings on Magnesium Alloy
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Damping Behavior and Mechanism of Graphite and Al₂O₃ Particles Reinforced Al Matrix Composites
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Fatigue Property and Fatigue Cracks of Ultra-Fine Grained Copper Processed by Equal-Channel Angular Pressing
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Electroactive Organic-Inorganic Layered Perovskite Hybrids: Steric Interaction between Aminopyridine and Trivalent Ferricyanide and Use for Electrochemical Sensing Device
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Damping Behavior and Mechanism of Graphite and Al₂O₃ Particles Reinforced Al Matrix Composites

Abstract:

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.