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Engineering

Research project: A study of Microstructure Alterations in White Structure Flaking Failures of Wind Turbine Bearings

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Microstructural changes related to damage in wind turbine bearings could be compared with recrystallization registered in severe plastic deformation processes.

Subsurface material microstructure alterations in wind turbine bearings such as White Etching Areas (WEA) can cause spalling and cracks leading to premature bearing failure. Severe Plastic Deformation processes such as Equal-Channel Angular Pressing (ECAP) and High Pressure Torsion (HPT) are known to produce recrystallization in metals. This study aims to investigate WEA through SPD processes under high strain conditions. The characterization of changes generated by SPD at micro and nano scales will be compared with the changes registered in the White Structure Flaking (WSF) of bearings under Rolling Contact Fatigue (RCF) conditions, which may reveal the mechanisms of the premature wind turbine bearing failure due to WSF.

Related research groups

national Centre for Advanced Tribology at Southampton (nCATS)
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