Design and Simulation on Cast metal Matrix Composite by Investment Casting
Metal Matrix Composite (MMC) is produced normally by melting the matrix material in a vessel and the molten metal is stirred systematically to form a vortex, and then the reinforcement particles are introduced through the side of vortex formed. However, this approach has disadvantages, mainly ari...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Trans Tech Publications
2011
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| Subjects: | |
| Online Access: | http://eprints.utem.edu.my/id/eprint/4404/1/AMR.264-265.323.pdf http://eprints.utem.edu.my/id/eprint/4404/ |
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| Institution: | Universiti Teknikal Malaysia Melaka |
| Language: | English |
| Summary: | Metal Matrix Composite (MMC) is produced normally by melting the matrix material in
a vessel and the molten metal is stirred systematically to form a vortex, and then the reinforcement
particles are introduced through the side of vortex formed. However, this approach has
disadvantages, mainly arising from the particle addition and the stirring method. There is certainly
local solidification of the melt induced by the particles during particle addition. This condition
increases the viscosity of the slurry and appears as air pockets between the particles. Moreover, the
rate of particle addition needs to be slowed down particularly when the volume fraction of the
particles to used increases. This study proposes the new methodology of producing cast MMC by
investment casting. Deformations of the die-wax and shell alloy systems are considered in a coupled
manner, but the coupled deformation of the wax-shell system is not included. Therefore, this study
presents the tasks pertaining to metal matrix composites and their interactions. As a result, the work
on wax and wax-die interactions is discussed. This study presents the use of computer programs for
determining the wax pattern dimensions based on three-dimensional finite-element simulations. The
model for coupled thermal and mechanical analysis is developed by ProCAST. The wax model is
described. The following factors are considered in the analysis: (1) the restraint due to geometrical
features in the metal die; and (2) process parameters such as dwell time, die/platen temperature,
injection pressure, and injection temperature. |
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