Fatigue Behavior of [0]8 SCS-6/Ti-6Al-4V Composite Subjected to High Temperature Turboshaft Design Cycles

    Published: Jan 1996

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    Mission cycle fatigue testing of a [0]8 SCS-6/Ti-6A1-4V composite was performed. The mission cycle simulates the stress-temperature-time profile in a ring-reinforced impeller of a turboshaft engine. The cycle has a fourteen minute period and attains a peak stress and temperature of 1100 MPa and 427‡C respectively. A fatigue life of 9,528 cycles was achieved. While this life was less than the design goal, 15,000 cycles, a moderate increase in fiber content coupled with a small decrease in peak stress or temperature would probably achieve the stated design goal.


    fatigue, titanium matrix composite, silicon carbide fiber

    Author Information:

    Aksoy, SZ
    Principle Engineer, Life Structures and Dynamics, Allied Signal, Stratford, CT

    Gayda, J
    Research Engineer, NASA Lewis Research Center, Cleveland, Ohio

    Gabb, TP
    Research Engineer, NASA Lewis Research Center, Cleveland, Ohio

    Committee/Subcommittee: E08.09

    DOI: 10.1520/STP16458S

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