STP1304

    Factors Affecting the Damping Capacity of TiC Particle Reinforced Zinc-22 Aluminum Composites

    Published: Jan 1997


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    Abstract

    Damping behavior of eutectoid zinc-aluminum composites was studied in the 25 to 33O°C temperature range using a low-frequency torsion pendulum. In this study the internal friction was affected by changes in microstructure and by the amount of cold work prior to testing. The highest damping was obtained for a composite with 15% titanium carbide (TiC) particles, a fine lamellar microstructure, and after being cold worked 20%. A high-temperature (HT) internal friction peak at a temperature just below the eutectoid transformation temperature was observed in the composite materials, and in the annealed base alloys cold worked prior to testing. The authors believe this HT peak is associated with recrystallization of the matrix prior to the eutectoid transformation.

    Keywords:

    damping capacity, zinc-aluminum alloy, particulate composites, TiC particle reinforcement


    Author Information:

    Lu, J
    Post-doctoral fellow and associate professor, The University of Missouri-Rolla, Rolla, MO

    Van Aken, DC
    Post-doctoral fellow and associate professor, The University of Missouri-Rolla, Rolla, MO


    Paper ID: STP11756S

    Committee/Subcommittee: E28.02

    DOI: 10.1520/STP11756S


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