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Lubricants and Additives Affect Spur-Gear FatigueSurface-fatigue tests conducted with AISI 9310 steel spur gears show surface-fatigue life of AISI 9310 steel spur gears increased as much as 400 percent by addition of small amount of phosphorus-type extreme-pressure (EP) additive in lubricant. Antiwear or EP additives either absorbed onto surface or react with surface to form protective coating or surface film. Boundary film provides barrier that prevents contact of metal surfaces and provides low shear strength, which reduces friction coefficient below base metal.
Document ID
19860000448
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Scibbe, H.
Townsend, D.
Aron, P.
Zaretsky, E.
Date Acquired
August 12, 2013
Publication Date
September 1, 1986
Publication Information
Publication: NASA Tech Briefs
Volume: 10
Issue: 5
ISSN: 0145-319X
Subject Category
Materials
Report/Patent Number
LEW-14314
Accession Number
86B10448
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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