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    Spectrum Load Effects on the Fretting Behavior of Ti-6Al-4V

    Published: 01 January 2000

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    An investigation was performed to determine the effects of spectrum loading on the fretting fatigue life of titanium alloy Ti-6Al-4V. The research program consisted of a 10 Hz spectrum load cycle applied at six conditions of interest with a normal pressure of 31 MPa. Baseline tests were performed at three stress levels, 345, 310, and 286 MPa maximum load using a conventional haversine waveform. Tests were performed using a spectrum load waveform consisting of 2 cycles, one at 345 MPa, followed by another at 310 MPa, repeated to failure. Additional tests were performed using 345 and 286 MPa. The final condition of interest was investigated using a 345/310/286 MPa waveform. Miners rale was applied to each of the spectrum load cases to test the hypothesis that the titanium alloy followed Miners Rule under the loading conditions. The three conditions of interest varied from Miners Rule by 23, 47, and 62%. From these results it was concluded that Miners Rule was insufficient to predict failure lives of Ti-6Al-4V in fretting fatigue.


    fretting, fatigue, titanium, spectrum, miners rale

    Author Information:

    Kinyon, SE
    Project Engineer, MTS Systems Corp., Minnesota, MN

    Hoeppner, DW
    Professor, The University of Utah, Salt Lake City, UT

    Committee/Subcommittee: E08.04

    DOI: 10.1520/STP14724S