This study investigates the effect of addition of SiC particles on Al 6061 alloy. The composites are prepared with varied (0, 2, 4, 6 and 8) weight percent of SiC particles through electromagnetic stir casting technique. Scanning Electronic Microscope (SEM) is employed to examine the microstructure of the fabricated composite and results depict that SiC content were uniformly dispersed in the Al 6061 matrix. Density of the composite is increased due to high density of SiC particles in comparison to Al 6061 alloy. Hardness and tensile tests are performed to investigate the mechanical properties of composite. The hardness and tensile strength is significantly improved up to 8 wt % of SiC particles. The novelty of this archival work lie in fact that few experiments have been carried out for Al 6061/SiC composite and some significant insight for the electromagnetic stir casting is achieved in the performed experiment.
Fused deposition modelling (FDM) is the one among various additive manufacturing techniques which can fabricate component of multi material. However, the tensile strength of FDM component is naturally low and hence it is difficult to use for the engineering application. For enhancing the mechanical properties, this study explores a novel methodology by adding the high strength material in between matrix material as reinforcement in the additive structure. In this study, ABS and PLA based reinforced composites are prepared. ABS and PLA are used as matrix material whereas PETG is used for the reinforcement. Unidirectional tensile test is performed to check the effect of reinforcement on tensile strength of the fabricated component. Experimental results depict that addition of PETG reinforcement material improves the tensile strength of ABS by about 70% and tensile strength of PLA material is improved by about 8%. Computational analysis is also performed under similar boundary condition to physical model. It is observed that computational results are close approximation to the experimental results. The methodology proposed in this study could be very useful for the fabrication of high strength component by using low cost FDM technology.
In the present investigation, an attempt was made to utilize RHA in the development of aluminium based composite material. AA6061 alloy was melted in muffle furnace. Preheated RHA and SiC were added in the aluminium alloy. Composite material was fabricated by stir casting technique. Microstructure image showed proper wettability of reinforcement material with aluminium alloy matrix. Uniform distribution was observed of reinforcement particles in aluminium alloy. It has been observed that by using the RHA and SiC simultaneously in aluminium alloy, mechanical properties were improved significantly. However; toughness and ductility were reduced. Heat treatment of composite material was also carried out to observe the enhancement of mechanical property. Results showed that after the heat treatment process, mechanical properties were further improved.
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