Effect of contact pressure on fretting fatigue behavior of Ti-1023

G.Q. Wu, X.L. Liu, H.H. Li, W. Sha, L.J. Huang

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    12 Citations (Scopus)
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    Abstract

    With a new test facility, we have investigated fretting fatigue properties of Ti-1023 titanium alloy at different contact pressure. Both fatigue fracture and fretting scar were analyzed by scanning electron microscopy (SEM). Moreover, the depth of crack initiation area in fatigue fracture has been analyzed quantitatively, to investigate the relationship between the depth of crack initiation area and the fretting fatigue strength. The changing trends of the depth of crack initiation area and fretting fatigue strength with the increase of contact pressure show obvious opposite correlations. The depth of crack initiation area increases rapidly with the increase of contact pressure at low contact pressure (smaller than 10 MPa), and the fretting fatigue strength drops rapidly. At the contact pressure of 10–45 MPa, both the depth of crack initiation area and the fretting fatigue strength do not vary significantly. Contact pressure influences fatigue strength through influencing the initiation of fatigue crack. The main damage patterns are fatigue flake and plow.
    Original languageEnglish
    Pages (from-to)20–27
    Number of pages8
    JournalWear
    Volume326-327
    Early online date31 Dec 2014
    DOIs
    Publication statusPublished - 15 Mar 2015

    Keywords

    • Fretting
    • Fatigue
    • Non-ferrous metals
    • Fracture
    • Electron microscopy
    • Wear testing

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