Study of the solubility of Pb,Bi and Sn in aluminum by mixed CALPHAD/DFT methods: Applicability to aluminum machining alloys |
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| Affiliation: | 1. Federal Institute of Education, Science and Technology of Pará, IFPA, Almirante Barroso Avenue 1155, 66093-020 Belém, PA, Brazil;2. Institute of Technology, Federal University of Pará, UFPA, Augusto Correa Avenue 1, 66075-110 Belém, PA, Brazil;1. Department of Materials and Mechanical Engineering, Buein Zahra Technical University, 3451745346, Qazvin, Iran;2. School of Engineering, Jönköping University, PO Box 1026, 551 11 Jönköping, Sweden;3. Department of Mechanical Engineering, Faculty of Engineering, University of Ottawa, Ontario, K1N 6N5, Canada;4. École Polytechnique de Montréal, Dép. de Génie Chimique, P.O. Box 6079, Centre-ville, Montreal, Quebec, H3C 3A7, Canada;1. Department of Materials, Manufacturing and Industrial Engineering, School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia (UTM), 81310, Johor Bahru, Malaysia;2. Department of Chemical and Materials Engineering, Buein Zahra Technical University, 3451745346, Qazvin, Iran;1. Department of Materials, Manufacturing and Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia (UTM), 81310, Johor Bahru, Malaysia;2. Faculty of Materials and Mechanical Engineering, Buein Zahra Technical University, 3451745346, Iran;3. Department of Mechanical Engineering, Faculty of Engineering, University of Ottawa, Canada;1. Department of Materials Science and Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway;2. Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway;3. Center for Advanced Materials, Qatar University, Doha, Qatar;1. School of Mechanical and Electrical Engineering, University of Heze, Heze, Shandong 274015, PR China;2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, PR China |
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| Abstract: | The aim of this work is a formulation of a thermodynamic model for the development of new aluminum machining alloys. The three additives Bi, Pb and Sn have proven to help machining. Hence, a review of the literature showed that the liquid phase equilibria and thermodynamic data for the three binary systems Al-Bi, Al-Pb and Al-Sn is very thorough but the limited information for the FCC solution required the use of Density Functional Theory (DFT) to predict thermodynamic data. The partial heat of mixing of these three machining additives in Al(FCC) are obtained and the results helped to improve the thermodynamic model using the CALPHAD method. It was shown that for all three binary systems, the thermodynamic data obtained at three fixed compositions and that obtained for a very dilute solution gave different enthalpy curves. The thermodynamic model was used to compute the ternary systems Al-Bi-Pb, Al-Bi-Sn and Al-Pb-Sn and small adjustable parameters were added to reproduce the literature data. |
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| Keywords: | Aluminum alloys Aluminum machining Thermodynamic modeling Solubility limits Density Functional Theory |
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