STP1159

    Effect of Contact Pressure on Fretting Fatigue of High Strength Steel and Titanium Alloy

    Published: Jan 1992


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    Abstract

    The effect of contact pressure on fretting fatigue behavior has been studied using a high strength steel and a Ti-6Al-4V alloy. In steel, at higher stress amplitude, the fretting fatigue life decreased monotonously with increasing contact pressure. At lower stress amplitude, it exhibited a minimum at a low contact pressure and a maximum at an intermediate contact pressure, then decreased again and became constant at high contact pressures. The fretting fatigue strength at 107 cycles was high at an intermediate contact pressure. In titanium alloy, the fretting fatigue life showed a similar contact pressure dependence. The frictional force increased monotonously with increasing contact pressure. The initiation site of the main crack depended on the contact pressure and had a close relation to the width of stick region at the fretted area. The contact pressure dependence was discussed in terms of stress concentration at the fretted area.

    Keywords:

    fretting fatigue, contact pressure, frictional force, crack initiation site, stick region, stress concentration, high strength steel, titanium alloy


    Author Information:

    Nakazawa, K
    Senior Researcher, Head of Research Laboratory, and Researcher, National Research Institute for Metals, Tsukuba,

    Sumita, M
    Senior Researcher, Head of Research Laboratory, and Researcher, National Research Institute for Metals, Tsukuba,

    Maruyama, N
    Senior Researcher, Head of Research Laboratory, and Researcher, National Research Institute for Metals, Tsukuba,


    Paper ID: STP25824S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP25824S


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