STP771: Observations of the Peeling Mode of Failure and Surface-Originated Flaking from a Ring-to-Ring Rolling Contact Fatigue Test Rig

    Tokuda, M
    Senior research scientist, staff engineer, senior research scientist, and managing director, NTN Toyo Bearing Co. Ltd., Kuwana,

    Nagafuchi, M
    Senior research scientist, staff engineer, senior research scientist, and managing director, NTN Toyo Bearing Co. Ltd., Kuwana,

    Tsushima, N
    Senior research scientist, staff engineer, senior research scientist, and managing director, NTN Toyo Bearing Co. Ltd., Kuwana,

    Muro, H
    Senior research scientist, staff engineer, senior research scientist, and managing director, NTN Toyo Bearing Co. Ltd., Kuwana,

    Pages: 16    Published: Jan 1982


    Abstract

    The ring-to-ring rolling contact fatigue rig is a standard test rig for producing rolling contact fatigue. It is suitable for basic research on rolling contact phenomena. Observations of two types of surface cracks, peeling microcracks under moderate contact stress and surface cracks due to excessively high contact stress, are described in this paper. The peeling grade is related to the metallic contact ratio. The running-in property observed in metallic contact monitoring is an important factor in determining the relationship between the lubricant's characteristics and peeling failure. Rolling contact under high contact stress produces surface-originated flaking by a crack initiation mechanism, that is, crack initiation resulting from fatigue by repeated cycles of small tension and large compression.

    Keywords:

    rolling fatigue, peeling, surface-originated flaking, crack initiation mechanism, bearing steels


    Paper ID: STP36138S

    Committee/Subcommittee: A01.28

    DOI: 10.1520/STP36138S


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