Stress-Rupture Strength and Microstructural Stability of W-Hf-C Wire-Reinforced Superalloy Composites

    Published: Jan 1975

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    W-Hf-C/superalloy composites were found to be potentially useful for turbine blade applications on the basis of stress-rupture strength. The 100- and 1000-h rupture strengths obtained for 70 volume percent fiber composites tested at 1090°C (2000°F) were 420 and 280 MN/m2 (61 000 and 41 000 psi). The investigation indicated that with better quality fibers, composites having 100- and 1000-h rupture strengths of 570 and 370 MN/m2 (82 000 and 54 000 psi) may be obtained. Metallographic studies indicated sufficient fiber-matrix compatibility for long-time applications at 1090°C (2000°F) for 1000 h or more.


    composite materials, fiber composites, heat resistant alloys, creep rupture strength

    Author Information:

    Petrasek, DW
    Lewis Research Center, Cleveland, Ohio

    Signorelli, RA
    Lewis Research Center, Cleveland, Ohio

    Paper ID: STP32323S

    Committee/Subcommittee: D30.08

    DOI: 10.1520/STP32323S

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