Micropitting of bearings and gears in aviation: history of topic and proposed methods
Document the aviation industry interest in oil formulation influence on micropitting wear by reviewing SAE E34 presentations on surface initiated fatigue wear theory and attempts to develop a practical screening test for micropitting propensity.
Rationale: The Aviation Propulsion Lubricants stakeholders have expressed interest in the decade since 2010 on the need to understand the surface initiating fatigue wear process called micropitting. A number of presentations and proposed methods to determine the influence on oil formulation to micropitting have been made to the SAE E34 committee. A review document was determined necessary to document the material and efforts that have come from these efforts.