Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10384807 | Wear | 2005 | 4 Pages |
Abstract
In this work, the rolling fatigue lives of three polyglycols (PAG-9, PAG-12 and BREOX-B-135X) are determined using IP-300 standard. A four-ball test machine was used and 10% life (L10) and 50% life (L50) were obtained. In addition, the stress-time curves for L10 and L50 were also determined. This work showed that: firstly, all polyglycols were tested under boundary lubrication regime (λ < 1) where in rolling contacts the surface mode of failures prevails; secondly, in oils of the same family, the pressure-viscosity coefficient is relatively constant, therefore an increase in viscosity improve the minimum film thickness with the consequent increase of the λ ratio; and finally, differences in λ ratio for the three polyglycols resulted in different asperity interactions and rolling contact fatigue lives.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
A. Hernandez Battez, J.E. Fernandez Rico, R. Chou Rodriguez,