Abstract
This study investigates the tribological behaviour of Al-20Mg2Si composite having potential applications in automobiles. A pin-on-disc apparatus was employed to assess its performance under diverse operating conditions relevant to automotive components. These conditions encompassed variations in sliding conditions (dry and lubricated), temperatures (ranging from 30°C to 200°C), and loads (20N, 40N, and 60N), with a focus on understanding their influence on wear characteristics, mechanisms, wear maps, and surface topography. The findings emphasize the pronounced impact of test conditions on wear properties. Dry sliding conditions showed a substantial increase in both cumulative wear and friction coefficient, rising by 13.17 and 1.47 times, respectively, from the 30°C test to the 200°C test with a 60N load. Conversely, lubrication yielded significantly lower cumulative wear and friction coefficients, measuring only 0.07 and 0.15 times those observed during room temperature dry sliding conditions. Surface roughness analysis confirmed that higher loads and temperatures resulted in increased roughness, while lubrication effectively reduced surface roughness. FESEM analysis of worn surfaces and debris revealed that under dry sliding at room temperature, the primary wear mechanism was abrasive, with secondary mechanisms being oxidative and adhesive wear. In contrast, at high temperatures during dry sliding, the primary mechanism shifted to adhesive wear, accompanied by secondary mechanisms including delamination, oxidative wear, and plastic deformation. Wear map analysis showed that at room temperature, wear changed from severe to moderate to mild as sliding distance increased. However, with increased temperature and load, wear shifted from mild to moderate to severe.
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The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.
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The authors are very grateful to the SERB for funding and the National Institute of Technology Durgapur, India for their research laboratories and all their support.
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The authors are grateful for the financial support provided by the Science & Engineering Research Board (SERB), SERB Sanction Order No: EEQ/ 2018/000592.
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RB completed the experiments and wrote the main manuscript text, prepared all the figures, PB helped in the investigation and writing of the manuscript, MM reviewed the manuscript and MKM supervised the work. All authors read and approved the final manuscript.
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Bhandari, R., Biswas, P., Mallik, M. et al. High Temperature and Lubricating Wear Behaviour of In-Situ Al-20Mg2Si Composite. Inter Metalcast (2023). https://doi.org/10.1007/s40962-023-01167-7
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DOI: https://doi.org/10.1007/s40962-023-01167-7