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.
In the present scenario, composites are in huge demand in the industries due to their light weight, wear resistance, stiffness and high strength. The functional and structural properties were improved according to the need of industry. Particulate reinforcement is one of the methods to enhance the strength, ductility and toughness of the composites. Stir casting or friction stir processing technique was used to fabricate the metal matrix composite. For technology seekers it is very difficult to select appropriate techniques because there is lack of bench mark standards and industry experiences. The novel contribution of this paper is to provide systematic approaches and methodology which enable academic user as well as industry persons to select appropriate method and parameters for the fabrication of the metal matrix composite. This study guides the new researchers to fabricate and characterize the mechanical properties of aluminium-based composites reinforced with Al2O3, B4C, SiC, TiC, graphite and TiB2 particles.
The increased demand of aluminium metal matrix composite in automobile and aerospace industries had enabled to manufacture the aluminum based composites. In this study, aluminium based composite material is fabricated using SiC and MgO reinforced particles. The stir casting technique is used to make the composite material. Attempts have been made to obtain the best composition by mixing SiC and MgO particles with different percentage. Looking at the microstructure image, it was found that both SiC and MgO particles are well combined with the matrix material. The addition of preheated SiC and MgO led to increase in tensile strength and hardness. However, the toughness of the composite material is reduced. Behavior of thermal expansion and corrosion weight loss of the composite material has reflected the presence of SiC and MgO content in the aluminum alloy. Minimum corrosion loss was found for Al/12.5 wt. % Preheat SiC/2.5 wt. % MgO composite material. Minimum dimension change was found to be 4.12 mm 3 for Al/12.5 wt. % Preheat SiC/2.5 wt. % MgO composite material.
There are various types of reinforcements used in the development of aluminium based metal matrix composites. It was observed that by the use of ceramic particles, mechanical characteristics such as hardness and tensile strength were enhanced. However, density and cost was also increased. Groundnut shell is waste product that produces lots of soil pollution. By utilizing ground nut shell ash as reinforcement material with aluminium, mechanical properties can be improved. Further, density and cost of composite can be reduced. The aim of this review article is to study the influence of various types of reinforcements in the fabrication of composites with enhanced mechanical properties.
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