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

Shravan Janakiraman, Ole West, Peder Klit, Niels Steenfeldt Jensen

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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
CountryDenmark
CityAarhus
Period10/06/201413/06/2014

Keywords

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

Cite this

Janakiraman, S., West, O., Klit, P., & Jensen, N. S. (2014). Laboratory Simulation of Rolling Contact Fatigue Cracks in Wind Turbine Bearings Using Hydrogen Infused 100Cr6 Bearing Steel. Paper presented at 16th Nordic Symposium on Tribology, Aarhus, Denmark.