PSI - Issue 33

Maria Beatrice Abrami et al. / Procedia Structural Integrity 33 (2021) 878–886 / Structural Integrity Procedia 00 (2019) 000–000

886

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4. Conclusions In this study, the sliding wear behavior at high temperature of AlMgScZr alloy was investigated by performing pin-on-disk tests. The following conclusions can be drawn: ● The wear steady state condition is reached after 500 m of sliding distance for all samples in the temperature range of 25-200°C. ● The coefficient of friction measured at steady state depends on temperature, showing and increase from 0.5-0.6 at room temperature to 0.8-0.9 at 200°C. ● Notwithstanding, the difference in COF, the wear rate of Scalmalloy at steady state is not affected by temperature, except at 200°C, where a light increase of wear rate is noticeable. ● The wear mechanism is mainly tribo-oxidative at low temperature (up to 100 °C), while at higher temperatures (150-200 °C) also adhesion occurs, explaining the increase of COF at steady state. ● Considering that the microstructure of AlMgScZr alloy remains stable with temperature, the variations in wear behavior can be mainly ascribed to different wear phenomena and mechanisms promoted by high temperatures. Ferreira, T., Koga, G. Y., de Oliveira, I. L., Kiminami, C. S., Botta W. J., Bolfarini, C., 2020. Functionally graded aluminum reinforced with quasicrystal approximant phases – Improving the wear resistance at high temperatures. Wear , 462-463. Herzog, D., Seyda, V., Wycisk, E., Emmelmann, C., 2016. Additive manufacturing of metals. Acta Materialia 117 , 371-392. Khairallah, S. A., Anderson, A. T., Rubenchik A., King, W.E., 2016. Laser powder-bed fusion additive manufacturing: Physics of complex melt flow and formation mechanisms of pores, spatter, and denudation zones. Acta Materialia 108 , 36-45. Kuo, C. N., Peng, P. C., Liu, D. H., Chao, C. Y., 2021. Microstructure evolution and mechanical property response of 3D-printed Scalmalloy with different heat-treatment times at 325 °C. Metals 11. Li, R., Wang, M., Yuan, T., Song, B., Chen, C., Zhou, K. & Cao, P., 2017. Selective laser melting of a novel Sc and Zr modified Al-6.2 Mg alloy: Processing, microstructure, and properties. Powder Technology, 319 , 117-128. Lorusso, M., Aversa, A., Manfredi, D., Calignano, F., Ambrosio, E. P., Ugues, D., Pavese, M., 2016. Tribological Behavior of Aluminum Alloy AlSi10Mg-TiB2 Composites Produced by Direct Metal Laser Sintering (DMLS). Journal of Materials Engineering and Performance 25 , 3152-3160. Milewski, J. O., 2017. Additive Manufacturing of Metals: From Fundamental Technology to Rocket Nozzles, Medical Implants, and Custom Jewelry. Salguero, J., Vazquez-Martinez, J. M., Del Sol, I. & Batista, M., 2018. Application of Pin-On-Disc techniques for the study of tribological interferences in the dry machining of A92024-T3 (Al-Cu) alloys. Materials 11. Singer, I. L., 1992. Solid lubrification processes. In “ Fundamentals of Friction: Macroscopic and Microscopic Processes”, ed. S. Netherlands, pp. 237-261. Spierings, A. B., Dawson, K., Heeling, T., Uggowitzer, P. J., Schäublin, R., Palm, F., Wegener, K., 2017. Microstructural features of Sc- and Zr modified Al-Mg alloys processed by selective laser melting. Materials and Design 115 , 52-63. Spierings, A. B., Dawson, K., Kern, K., Palm, F., Wegener, K., 2017. SLM-processed Sc- and Zr- modified Al-Mg alloy: Mechanical properties and microstructural effects of heat treatment. Materials Science and Engineering A 701 , 264-273. Straffelini, G., 2015. Friction and Wear. Springer. Tocci, M., Pola, A., Girelli, L., Lollio, F., Montesano, L., Gelfi, M., 2019. Wear and cavitation erosion resistance of an AlMgSc alloy produced by DMLS. Metals 9. Vernon, W.H.J., Calnan, E.A., Clews, C.J.B., Nurse, T.J., 1953. The oxidation of iron around 200 °C, Proc. R. Soc. London. Ser. A. Math. Phys. Sci. 216, 375–397 Yang, L., Hsu, K., Baughman, B., Godfrey, D., Medina, F., Menon, M., Wiener, S, 2017. Additive Manufacturing of Metals: The Technology, Materials, Design and Production. Springer. Yeong, W. Y., Chua, C. K., Leong, K. F., Chandrasekaran, M., 2004. Rapid prototyping in tissue engineering: Challenges and potential. Trends in Biotechnology 22 , 643-652. Zhang, H., Gu, D., Yang, J., Dai, D., Zhao, T., Hong, C., Gasser, A., Poprawe, R., 2018. Selective laser melting of rare earth element Sc modified aluminum alloy: Thermodynamics of precipitation behavior and its influence on mechanical properties. Additive Manufacturing 23 , 1 12. References