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@article{Olver:2007,
author = {Olver, AV and Dini, D and Lainé, E and Beveridge, TA and Hua, DY},
journal = {American Gear Manufacturers Association - Fall Technical Meeting of the American Gear Manufacturers Association 2007, AGMA},
pages = {151--160},
title = {Roughness and lubricant chemistry effects in micropitting},
year = {2007}
}
TY - JOUR
AB - Micropitting has been studied using a disc machine in which a central carburised steel test roller contacts three, harder, counter-rollers ("rings") with closely controlled roughness. We varied the roughness using different finishing techniques and investigated the effects of different oil base-stocks and additives, whilst keeping the viscosity approximately constant. We also developed a predictive model for the approximate analysis of rough-surface elastohydrodynamic lubrication based on the FFT approach of Hooke. Damage on the test rollers included dense micropitting and "micropitting erosion" in which tens of microns of the test surface were completely removed. This phenomenon is particularly damaging in gear teeth where it has the potential to destroy profile accuracy. It was found that anti-wear additives led to a high rate of micropitting erosion and that the effect correlated more or less inversely with simple sliding wear results. There were also appreciable effects from base-stock chemistry. The key parameter affecting the severity of damage seemed to be the near-surface shear stress amplitude arising from the evolved roughness; different chemistries led to the evolution of different roughness during initial running and thence to different contact stresses and different levels of damage. © AGMA 2007 - All rights reserved.
AU - Olver,AV
AU - Dini,D
AU - Lainé,E
AU - Beveridge,TA
AU - Hua,DY
EP - 160
PY - 2007///
SP - 151
TI - Roughness and lubricant chemistry effects in micropitting
T2 - American Gear Manufacturers Association - Fall Technical Meeting of the American Gear Manufacturers Association 2007, AGMA
ER -