STP497

    Pendulum Impact Resistance of Tungsten Fiber/Metal Matrix Composites

    Published: Jan 1972


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    Abstract

    The impact properties of copper, copper-10 nickel, and a superalloy matrix reinforced with tungsten fibers were studied. In most cases, the following increased composite impact strength: increased fiber or matrix toughness, decreased fiber-matrix reaction, increased test temperature, hot working and heat treatment. Notch sensitivity was reduced by increasing fiber or matrix toughness. The effect of fiber content depended on the relative toughness of the fibers and matrix. Above 530 K a 60 volume percent superalloy matrix composite had a greater impact strength than a turbine blade superalloy, whereas below 530 K a hot worked 56 volume percent composite had a greater impact strength than the superalloy.

    Keywords:

    tungsten, fibers, fiber composites, heat resistant alloys, copper, copper-nickel alloys, turbine blades, dissimilar materials bonding, toughness, notch sensitivity, impact strength, heat treatment, hot working


    Author Information:

    Winsa, EA
    Aerospace engineers, Lewis Research Center, National Aeronautics and Space Administration, Cleveland, Ohio

    Petrasek, DW
    Aerospace engineers, Lewis Research Center, National Aeronautics and Space Administration, Cleveland, Ohio


    Paper ID: STP27757S

    Committee/Subcommittee: D30.02

    DOI: 10.1520/STP27757S


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