Friction coefficient and wear mode transition in micro-scale abrasion tests |
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| Affiliation: | 1. Centro Universitário da FEI—Fundação Educacional Inaciana “Padre Sabóia de Medeiros”, Departamento de Engenharia Mecânica, Av. Humberto de Alencar Castelo Branco, 3972, 09850-901, São Bernardo do Campo, SP, Brazil;2. Escola Politécnica da Universidade de São Paulo, Departamento de Engenharia Mecânica, Laboratório de Fenômenos de Superfície, Av. Prof. Mello Moraes, 2231, 05508-030, São Paulo, SP, Brazil;1. Department of Chemical and Metallurgical Engineering, Tshwane University of Technology, P.M.B. X680, Pretoria 0001, South Africa;2. Centre for Scientific and Industrial Research – National Laser Centre, P.O. Box 395, BLD 46F, Pretoria 0001, South Africa;1. Key Laboratory for Electromagnetic Field Assisted Processing of Novel Materials, Moscow Engineering Physics Institute, Russia;2. Mechanical Engineering, San Diego States University, USA;1. Department of Physics, University of Ottawa, 150 Louis Pasteur, Ottawa, ON K1N 6N5, Canada;2. Security and Disruptive Technologies Portfolio, National Research Council Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada;1. Chemistry Department, Faculty of Science, Taif University, Taif, Saudi Arabia;2. Chemistry Department, Faculty of Science, Suez Canal University, Ismailia, Egypt;3. Chemistry Department, Faculty of Science, Al-Azhar University, Cairo, Egypt;1. Surface Phenomena Laboratory, Department of Mechanical Engineering, Polytechnic School of the University of São Paulo, Av. Prof. Mello Moraes 2231, 05508-900 São Paulo, Brazil;2. Federal University of ABC—UFABC, Santo André 09210-170, Brazil |
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| Abstract: | The purpose of this work was to conduct ball-cratering wear tests to monitor both normal and tangential forces. Balls of 52100 steel, a specimen of H10 tool steel and an abrasive slurry prepared with silicon carbide particles and distilled water were used. Optical microscopy analysis of the worn craters revealed the presence of only grooving abrasion. However, a more detailed analysis conducted by SEM has indicated that different degrees of rolling abrasion have also occurred along the grooves. The results also showed that the normal force plays an important role in the scattering of the values of the friction coefficient. |
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