Expressing wear rate in sliding contacts based on dissipated energy |
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| Affiliation: | 1. School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China;2. Tribology Research Institute, Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, China;1. Institute of Materials Science, Leibniz Universität Hannover, 30823 Garbsen, Germany;2. South Ukrainian National Pedagogical University, ul. Staroportoffrankovskaya 26, Odessa 65020, Ukraine;1. Tampere Wear Center, Department of Materials Science, Tampere University of Technology, P.O. Box 589, FI-33101 Tampere, Finland;2. Ruukki Metals Inc., P.O. Box 93, 92101 Raahe, Finland;3. VTT Technical Research Centre of Finland, P.O. Box 1000, FI-02044 VTT Espoo, Finland;1. Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK;2. School of Mechanical Engineering, Beijing Institute of Technology, Beijing 10081, China;3. Rools-Royce@NTU Corporate Laboratory, Nanyang Technological University, Singapore |
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| Abstract: | The wear of materials in sliding contacts is considered as resulting from an energy dissipation due to friction between the contacting first bodies. Up to now, no standard procedure in tribology is available to relate that dissipated energy with wear losses for different sliding wear tests and conditions. In this paper, a procedure is proposed to correlate the volumetric wear loss of one first body with the dissipated energy for unidirectional and bidirectional ball-on-flat tests. The model can be useful to predict the service lifetime of components from a limited number of laboratory tests. The validity and limitation of the wear loss versus dissipated energy model is illustrated for hard coatings like TiN and (Ti, Al)N, and multilayered (Ti, Al)N/TiN coatings. The effect of the applied normal load and the relative humidity (RH) of the ambient air on the wear rate for these different coatings are shown as well. A mild oxidational wear model is used to describe the material loss on these coatings in sliding contacts. |
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