Affiliation:
1. Surface Phenomena Laboratory, Escola Politécnica da Universidade de São Paulo, São Paulo 05508-010, Brazil
2. Centro de Pesquisa, Desenvolvimento e Ensaios da Termomecanica São Paulo S.A., São Paulo 09612-000, Brazil
Abstract
A custom tribometer was developed to measure friction coefficient and temperature in high-pressure, low-velocity conditions, specifically for studying copper alloys used in sliding bearings for heavy equipment. Using this equipment, two commercial alloys were tested to evaluate friction coefficient, specific wear rate, thermal behavior, and subsurface strain. The results, validated through comparison with reference commercial equipment and uncertainty estimates, met acceptable criteria for tribological tests, with an uncertainty estimate value for the friction coefficient of 0.4%. The tribological tests confirmed the importance of solid lubrication in high-lead bronzes and the high wear resistance of Cu-Al-Ni-Fe alloys, which directly influence temperature, subsurface strain, and respective wear mechanisms.
Reference48 articles.
1. Kingsbury, G.R. (1990). Friction and Wear of Sliding Bearing Materials, ASM International.
2. Glaeser, W.A. (1992). Materials for Tribology, Elsevier Science.
3. The effect of microstructure and lead content on the tribological properties of bearing alloys;Ruusila;Proc. Inst. Mech. Eng. Part J J. Eng. Tribol.,2013
4. Materials for Plain Bearings;Pratt;Int. Metall. Rev.,2013
5. Hutchings, I.M. (1992). Tribology: Friction and Wear of Engineering Materials, CRC Press.