A Modified Ball-on-Rod Type Rolling Contact Fatigue (RCF) Tester for Accelerated Testing of Candidate Lubricants and Bearing Materials

Trivedi, Hitesh K.; Gerardi, David T.; Forster, Nelson H.; Rosado, Lewis; Givan, Garry D.

doi:10.4271/951041

Cited by 7 publications

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Rolling Contact Fatigue Evaluation of Advanced Bearing Steels with and Without the Oil Anti-Wear Additive Tricresyl Phosphate

2010

Self Cite

View full text Add to dashboard Cite

The effect of the oil anti-wear additive tricresyl phosphate (TCP) on rolling contact fatigue (RCF) life of advanced bearing steels-AISI VIMVAR M50, CSS 42L, Pyrowear 675, and Cronidur 30 was investigated with silicon nitride balls at 177°C and at a maximum Hertzian stress of 5.5 GPa. TCP at 1% additive concentration was blended into a synthetic polyol ester turbine engine lubricant basestock having a nominal viscosity of 3 cSt at 100°C. Additionally, the basestock was fortified with the antioxidants dioctyl-diphenyl amine (DODPA) and phenyla-napthyl amine (PANA) at 1% concentration each. The presence of TCP has a measurable positive effect on RCF life and wear. Also, all the advanced bearing materials exhibited superior fatigue life compared to conventional bearing steel M50, both with and without TCP. The study indicates that current gas turbine lubricant formulations with TCP have positive effects on fatigue life and wear performance of M50, Pyrowear 675, CSS 42L, and Cronidur 30.

show abstract

Rolling Contact Fatigue Evaluation of Advanced Bearing Steels with and Without the Oil Anti-Wear Additive Tricresyl Phosphate

2010

Self Cite

View full text Add to dashboard Cite

show abstract

Low Temperature Plasma Nitriding of Pyrowear 675

Trivedi

Monahan²

2014

Bearing Steel Technologies: 10th Volume, Advances in Steel Technologies for Rolling Bearings

View full text Add to dashboard Cite

Microstructural Changes in Aerospace Bearing Steels under Accelerated Rolling Contact Fatigue Life Testing

Kirsch

Trivedi

2017

Bearing Steel Technologies: 11th Volume, Advances in Steel Technologies for Rolling Bearings

View full text Add to dashboard Cite

Operating in the extreme environment of a turbine engine, aerospace bearings must endure high thrust loads and very high rotational speeds. Subsurface fatigue damage is often observed as stressed zones, dark etching regions, light etching regions, and white etching regions. American Iron and Steel Institute (AISI) 52100 bearing steel is widely studied for microstructural changes and has been reported in the literature. Microstructural changes in a large test matrix of advanced materials for aerospace applications have not been studied. In this study, one through-hardened (VIM-VAR AISI M50) and four case-hardened materials (M50 NiL, M50 NiL Nitrided, Pyrowear® 675 High Temperature Temper, and Pyrowear® 675 Low Temperature Temper) were tested with silicon nitride balls under accelerated life conditions on a ball-on-rod rolling contact fatigue bench tester. Microstructural changes were characterized by light optical microscopy and scanning electron microscopy in radial and axial cross-section views. White etching cracks and white etching regions were observed in M50, M50-NiL, and M50-NiL (N) with shorter average fatigue lives as compared to either version of Pyrowear® 675.

show abstract

A Modified Ball-on-Rod Type Rolling Contact Fatigue (RCF) Tester for Accelerated Testing of Candidate Lubricants and Bearing Materials

Cited by 7 publications

References 13 publications

Rolling Contact Fatigue Evaluation of Advanced Bearing Steels with and Without the Oil Anti-Wear Additive Tricresyl Phosphate

Rolling Contact Fatigue Evaluation of Advanced Bearing Steels with and Without the Oil Anti-Wear Additive Tricresyl Phosphate

Low Temperature Plasma Nitriding of Pyrowear 675

Microstructural Changes in Aerospace Bearing Steels under Accelerated Rolling Contact Fatigue Life Testing

Contact Info

Product

Resources

About