Abstract
In this paper, an effort has been made to study the influence of copper chill on tribological properties of Aluminium Metal Matrix Composites (AMMCs). Hematite particles are used as reinforcement in the metal matrix of A356. The composite was developed through sand casting process with and without copper chills to get homogeneous and isotropic material properties. Hematite particles were reinforced at different weight percentage ranges from 0 wt% to 12 wt% in phases about 3 wt%. Experiments were conducted to study the wear behaviour using pin on disc type dry sliding wear testing equipment, the parameters like applied loads, sliding velocities, and the co-efficient of friction were varied by keeping sliding distance and time as constant. The composites of casted with copper chills revealed superior wear resistance as compared to the composites of casted without copper chills. Micrographic analysis was performed using XRD (X-Ray Diffraction) patterns and (Scanning Electron Microscope) SEM photos. The existence of Hematite particles was confirmed from XRD and also found that the uniform dispersal of Hematite particles in the A356 matrix alloy of composites casted with copper chills. The fine grained structure was obtained due to rapid cooling which influence in improving wear resistance in the composites with copper chills. It was also observed from SEM photos the worn-out surface is smooth in the composites of 9 wt % casted with copper chills as compare to that off without copper chills.
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Sunil Kumar, M., Sathisha, N., Jagannatha, N. et al. Tribological Study on Effect of Chill Casting on Aluminium A356 Reinforced with Hematite Paticulated Composites. J Bio Tribo Corros 8, 52 (2022). https://doi.org/10.1007/s40735-022-00635-7
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DOI: https://doi.org/10.1007/s40735-022-00635-7