Laboratory Simulation of Rolling Contact Fatigue Cracks in Wind Turbine Bearings Using Hydrogen Infused 100Cr6 Bearing Steel

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    Abstract

    Premature fatigue failure is observed in rolling element bearings used in wind turbine components. It is believed that decomposed hydrogen from the lubricant diffuses into the surface of the bearing inner ring making it susceptible to failure. An attempt is made to simulate the formation of these cracks by accelerated laboratory tests. Hydrogen is artificially infused into the surface of ring specimens and the rings are then press fit onto shafts. This introduces a tensile Hoop Stress in the rings. The rings are then run against each other until fracture of one of the rings is observed. Preliminary test results show a failure characteristics similar to those observed in the inner rings of rolling element bearings used in service.
    Original languageEnglish
    Publication date2014
    Number of pages5
    Publication statusPublished - 2014
    Event16th Nordic Symposium on Tribology - Scandinavian Congress Center, Radisson Blu Scandinavia Hotel, Aarhus, Denmark
    Duration: 10 Jun 201413 Jun 2014
    Conference number: 16

    Conference

    Conference16th Nordic Symposium on Tribology
    Number16
    LocationScandinavian Congress Center, Radisson Blu Scandinavia Hotel
    Country/TerritoryDenmark
    CityAarhus
    Period10/06/201413/06/2014

    Keywords

    • Rolling Contact Fatigue
    • Bearing failure
    • Hydrogen charging
    • White etching areas
    • 100Cr6 steel

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