Axle gear oils: Tribological characterization under full film lubrication. (February 2017)

• Record Type: Journal Article
• Authors: Hammami, Maroua; Martins, Ramiro; Abbes, Mohamed Slim; Haddar, Mohamed; Seabra, Jorge
• Is Part Of: Tribology international. Volume 106(2017)
• Page Start: 109
• Page End: 122
• Publication Date: 2017-02
• Subjects: Axle oils -- Tribological properties -- Film thickness -- Friction coefficient; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2016.05.051
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: The tribological properties of five axle gear oils are characterized. Three oils (75W90-A, 80W90-A and 75W140-A), available on the market and labeled as "Fuel Efficient", were selected together with two candidate products (75W85-B and 75W90-B). Their viscosity, film generation and traction properties were measured for three different temperatures under full film lubrication regime. The product formulation and the measured properties promote significant differences under full film lubrication. The film thickness is directly related with the Lubricant Parameter while the traction coefficient depends on the base oil and it decreases with the increase of Viscosity Index and the decrease of Piezoviscosity. So, new lubricants with lower viscosity but holding high VI and low Piezoviscosity are promising for this application. Abstract : Highlights: Film thickness measurements of axle gear oils. Traction measurements of axle gear oils. Stribeck curves of axle gear oils. Indirect piezoviscosity characterization. Rheological characterization of axle gear oils.