Differences in Mechanisms for Fretting Wear Reduction between Oil and Grease Lubrication

  title={Differences in Mechanisms for Fretting Wear Reduction between Oil and Grease Lubrication},
  author={Taisuke Maruyama and Tsuyoshi Saitoh and Atsushi Yokouchi},
  journal={Tribology Transactions},
  pages={497 - 505}
ABSTRACT The different mechanisms of fretting wear in oil and grease lubrication and methods to reduce fretting wear were examined by means of thrust ball bearings in this study. Tests of fretting wear under oil lubrication were conducted. It was confirmed that high-viscosity oil can reduce fretting wear at high velocity (i.e., high frequency) through oil film formation. In the case of grease lubrication, the influence of velocity on fretting wear was significantly different for low- and high… 
  • Materials Science
  • 2016
INTRODUCTION There is concern regarding the fretting wear of rolling bearings used in various types of machines, especially those that oscillate minutely. Because fretting wear results in the
Representative Tribometer Testing of Wire Rope Fretting Contacts: The Effect of Lubrication on Fretting Wear
Abstract Fretting wear has a significant influence on wire rope fatigue life when in cyclic bending, particularly for crossed wire contacts, where the interfacial motion of the surfaces is complex
Mitigation of False Brinelling in a Roller Bearing: A Case Study of Four Types of Greases
Four commercial greases with various thickeners and base oils were experimentally examined to compare their false brinelling wear resistance in a test rig simulating roller bearings during rail/sea
Lubrication Condition Monitoring of Practical Ball Bearings by Electrical Impedance Method
In this study, the electrical impedance method was developed to monitor the thickness and breakdown ratio of oil films in elliptical elastohydrodynamic (EHD) contacts of practical ball bearings.
In Situ Quantification of Oil Film Formation and Breakdown in EHD Contacts
Abstract A measurement method using electrical impedance has been developed for simultaneous quantifications of the thickness (h) and breakdown ratio (α) of oil films in elastohydrodynamic (EHD)
Tribological Performance of Ni3Al Matrix Self-Lubricating Composites Containing Multilayer Graphene Prepared by Additive Manufacturing
In order to improve tribological performance of Ni3Al-based alloy, Ni3Al matrix composites containing 1.5 wt.% multilayer graphene (MLG) are prepared through additive manufacturing (AM) and spark


Evaluation of Fretting Protection Property of Lubricating Grease Applied to Thrust Ball Bearing
Fretting wear is often the case when ball-and-roller bearings oscillate under grease lubrication. Against the backdrop of fretting wear on the wheel bearings of automobiles caused by rail
Gaseous Cavitation and Wear in Lubricated Fretting Contacts
Fretting phenomena operating in the presence of grease was investigated experimentally and analytically. A fretting test rig was designed, developed, and equipped with a microscope and high-speed
On the Film Thickness of Grease-Lubricated Contacts at Low Speeds
The contribution of the thickener to the thickness of the lubricating film in grease-lubricated contacts is investigated. Four different types of greases were tested in a ball/spherical
Fretting of WC/a-C:H and Cr2N Coatings Under Grease-Lubricated and Unlubricated Conditions
The fretting phenomenon was investigated experimentally in contacts between coated and uncoated steel rod and ball specimens generating a circular Hertzian contact. A fretting wear test rig equipped
A Numerical and Experimental Investigation of Fretting Wear and a New Procedure for Fretting Wear Maps
In this investigation, the fretting wear phenomenon was investigated experimentally and analytically. For the analytical investigation, a combined finite discrete element model (FDEM) was developed
Effects of a thickener structure on grease elastohydrodynamic lubrication films
Abstract The effects of the thickener structure and base oil viscosity on the grease film formation in rolling point elastohydrodynamic contacts have been discussed on the basis of direct observation