Prediction of cooling curves during solidification of Al 6061–SiCp based metal matrix composites using finite element analysis |
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| Authors: | SK Jagadeesh CS Ramesh JM Mallikarjuna R Keshavamurthy |
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| Affiliation: | 1. Department of Mechanical Engineering, Dr. Ambedkar Institute of Technology, Bangalore 560056, India;2. Department of Mechanical Engineering, PES Institute of Technology, 100ft Ring Road, BSK 3rd Stage, Bangalore 560085, Karnataka, India;3. Indian Institute of Technology Madras, Chennai 600036, India;1. School of Mechanical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, Republic of Korea;2. Department of Mechanical Engineering, Jadavpur University, Kolkata 700 032, India;1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, PR China;2. College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, PR China;1. School of Metallurgy and Materials, College of Engineering, University of Tehran, Tehran, Iran;2. Iranian National Center for Laser Science and Technology (INLC), P.O. Box 14665-576, Tehran, Iran;1. Barbara Hardy Institute, School of Engineering, University of South Australia, Mawson Lakes Campus, SA 5095, Australia;2. Fakulti Kejuruteraan Mekanikal, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia |
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| Abstract: | In recent years, aluminium based cast composites have gained popularity in all the emerging fields of technology owing to their superior high stiffness and strength. The properties of cast composites are dictated largely by the solidification phenomenon, which needs to be well understood by foundry technologists. Information on the solidification studies of cast composites is scarce. However, the theoretical prediction of the solidification behaviour of cast composites by the use of commercially available finite element analysis (FEA) software has not yet been reported. The theoretical prediction can definitely yield good lot of information as regards the cooling rates of the cast composites saving enormous time in experimentation. In light of the above, the present investigation is aimed at the prediction of cooling curves of Al 6061–SiCp composites using finite element analysis. L-shaped composite castings were prepared using stir cast technique. The temperature of the composite during solidification was measured by K-type thermocouple, from which the cooling curves were constructed. Experiments were carried out over a range of particle weight percentage of 2–6 wt% in steps of 2 wt%. Comparison of the cooling curves of Al 6061–SiCp composite with the un-reinforced alloy reveals significant decrease in cooling rate with the addition of SiC particles. A two-dimensional transient heat transfer model was used in commercial finite element analysis software to predict the cooling curves of composite castings. The predicted cooling curves are compared with results obtained from experiments and found to be in good agreement. |
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