Temperature Dependence of the Friction Coefficient of Grease-Lubricated PTFE Linear Bushings Against Titanium Grade 5 Alloy (Ti6Al4V) and Life Tests Operating at High-Speed
| Autor: | Efren Diez-Jimenez, Jose-Luis Perez-Diaz, J. L. Perez-del-Alamo, Ignacio Valiente-Blanco |
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| Rok vydání: | 2020 |
| Předmět: |
Friction coefficient
0209 industrial biotechnology Materials science Mechanical Engineering Alloy chemistry.chemical_element Titanium alloy 02 engineering and technology Surfaces and Interfaces engineering.material Surfaces Coatings and Films Stress (mechanics) 020303 mechanical engineering & transports 020901 industrial engineering & automation 0203 mechanical engineering chemistry Mechanics of Materials Grease engineering Composite material Titanium |
| Zdroj: | Journal of Tribology. 142 |
| ISSN: | 1528-8897 0742-4787 |
| DOI: | 10.1115/1.4046708 |
| Popis: | Linear bushings are a compact and reliable solution for mechanisms requiring relative linear displacement between moving parts. In this paper, we report the dependence of the coefficient of friction (COF) of polytetrafluoroethylene (PTFE) grease-lubricated bushings against a Ti6Al4 V (grade 5) alloy shaft at high temperatures up to 200 °C, for a motion speed of up to 0.47 m/s and a load pressure of 0.8 MPa. A proportional sensitivity of the COF with temperature is observed due to the change in the viscosity of the grease lubricant. Results of survival tests are also reported demonstrating a total sliding distance of 3200 m without maintenance and a total a total sliding distance of 10,200 m without critical failure. |
| Databáze: | OpenAIRE |
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