Abstract
The warm and hot upsetting sliding test (WHUST) is a direct measuring method of friction coefficient in metal forming processes. This specific test can conduct severe contact conditions referring to the tool-workpiece interface. In the WHUST, a contactor slides along a specimen with a constant penetration depth to generate a plastic strain in the vicinity of the contact surface. When performing the WHUST on aluminum alloys at high temperatures, pile-up material occurs in front of the contactor, causing a modification of the contact geometry. This study aims to indicate the impact of the pile-up material on identifying the friction coefficient. The analytical equation to determine the friction coefficient is presented, which considers the parameter of the pile-up material. In this study, the WHUST was scaled down from the existing device [1] and installed in the hot chamber to perform the tribological test at a precisely controlled temperature. The experimental data were used to identify the friction coefficient by different equations with and without considering the parameter of the pile-up material. Comparing the results show that the friction coefficient can be overestimated if the pile-up material is avoided to consider in the equation. Moreover, the evolutions of the friction coefficient and the material transfer at different sliding distances were experimentally investigated in this study by the WHUST on AA 6082-T6 aluminum alloy at 400 ℃.
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References
Dubois, A., Dubar, M., Dubar, L.: Warm and hot upsetting sliding test: tribology of metal processes at high temperature. Proc. Eng. 81, 1964–1969 (2014)
Tekkaya, A.E., Min, J.: Special issue on automotive lightweight. Automot. Innov. 3, 193–194 (2020)
Dohda, K., Yamamoto, M., Hu, C., Dubar, L., Ehmann, K.F.: Galling phenomena in metal forming. Friction 9, 665–685 (2021)
Jerina, J., Kalin, M.: Initiation and evolution of the aluminium-alloy transfer on hot-work tool steel at temperatures from 20 °C to 500 °C. Wear 319, 234–244 (2014)
Le Mercier, K., Dubar, M., Mocellin, K., Dubois, A., Dubar, L.: Quantitative analysis of galling in cold forging of a commercial Al-Mg-Si alloy. Proc. Eng. 207, 2298–2303 (2017)
Decrozant-Triquenaux, J., Pelcastre, L., Prakash, B., Hardell, J.: Influence of lubrication, tool steel composition, and topography on the high temperature tribological behaviour of aluminium. Friction 9(1), 155–168 (2020). https://doi.org/10.1007/s40544-020-0371-6
Triquenaux, J.D., Pelcastre, L., Courbon, C., Prakash, B., Hardell, J.: Effect of surface engineered tool steel and lubrication on aluminium transfer at high temperature. Wear 477 (2021)
Dubar, L., Dubois, A., Dubar, M.: Friction and wear in metal forming: 25 years at LAMIH UMR CNRS 8201. Key Eng. Mater. 767, 42–58 (2018)
Dubois, A., Oudin, J., Picart, P.: Elastoplastic finite element analyses of an upsetting-sliding test for the determination of friction at medium and high contact pressure. Tribol. Int. 29, 603–613 (1996)
Lazzarotto, L., Dubar, L., Dubois, A., Ravassard, P., Oudin, J.: Identification of Coulomb’s friction coefficient in real contact conditions applied to a wire drawing process. Wear 211, 54–63 (1997)
Acknowledgement
The authors would like to acknowledge the French Ministry of Higher Education and Research, the French National Center for Scientific Research (CNRS), the Hauts de France Region, the Carnot Arts Institute, and the Royal Thai government for their financial support.
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Soranansri, P., Dubois, A., Moreau, P., Dubar, L. (2024). Consideration of Pile-Up Material on Identification of Friction Coefficient in Aluminum Forming Processes at High Temperature. In: Mocellin, K., Bouchard, PO., Bigot, R., Balan, T. (eds) Proceedings of the 14th International Conference on the Technology of Plasticity - Current Trends in the Technology of Plasticity. ICTP 2023. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-031-41341-4_30
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DOI: https://doi.org/10.1007/978-3-031-41341-4_30
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