Fretting wear is a destructive phenomenon that can accelerate crack initiation in vibrating components, leading to premature catastrophic failures. Prevalent in Ti-alloy contacts, fretting wear often occurs in blade/disk interfaces of fan and compressor stages in turbine engines. Currently surface coatings and solid lubricants are implemented to reduce interfacial damage. However, the extreme temperatures of turbine engines limit current solid lubricants. Typical lubricants used are MoS2 and Graphite based. Current research is focused on the use of composite lubricants, or lubricants with additives that expand effective operational range of the particular solid lube. This presentation shows the conclusions from the testing/evaluation of solid lubricant mixtures of MoS2, WS2, Sb2O3, and graphite burnished onto the surface of Ti6Al4V substrates and subjected to gross slip fretting wear from room temperature to 450°C (842°F).
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