ISSN: 2277-9655 [George* et al., 7(4): April, 2018] Impact Factor: 5.164 IC™ Value: 3.00 CODEN: IJESS7 http: // www.ijesrt.com© International Journal of Engineering Sciences & Research Technology [437] IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY FABRICATION AND CHARACTERIZATION OF ALUMINIUM HYBRID COMPOSITE Basil George 1 , Anoop Sankar 2 , Bibin K.T 3 1 PG scholar, Mechanical Engineering, Mar Baselios Institute of Technology and Science, India 2 Asst. Prof, Mechanical Engineering, Mar Baselios Institute of Technology and Science, India 3 Asst. Prof, Mechanical Engineering, Mar Baselios Institute of Technology and Science, India DOI: 10.5281/zenodo.1218679 ABSTRACT Metal matrix composites (MMCs) constitute an important class of design and weight-efficient structural materials that are encouraging every sphere of engineering applications. There has been an increasing interest in composites containing low density and low cost reinforcements. Among various discontinuously dispersed solids used, fly ash is one of the most inexpensive and low density reinforcement available in large quantities as solid waste by-product during combustion of coal in thermal power plants. Hence, composites with fly ash as reinforcement are likely to overcome the cost barrier for wide spread applications in automotive and small engine applications. To produce Al matrix cast particle composites, wettaility of the ceramic particles by liquid Al is essential. To improve wettabilty, elements such as Mg and Si are added into Al melt to incorporate the ceramic particles. The present investigation has been focused on the utilization of abundant available industrial waste fly ash in useful manner by dispersing it into aluminium matrix by liquid metallurgy route. Wide size range (0.1-100μm) fly ash particles are used. To increase lubrication 5% of graphite is added as extra reinforcement. These composites were analyzed and tested the mechanical properties. The result reveals that the addition of flyash and graphit particles in aluminium matrix improves the mechanical properties. KEYWORDS: Composites, Mechanical Testing, Stir Casting, Wear behaviour I. INTRODUCTION Composite is the tailor made material, which means that two or more materials are combined together to get the required physical and mechanical properties. The characteristics of the developed material are totally different from its individual constituent materials. The individual constituent materials are remains distinct within the finished structure. The development of composites has reflected the requirement to accomplish property combinations beyond those achievable in monolithic metals alone. Thus, customized composites resulting from the addition of reinforcements to a matrix may give improved specific stiffness together with improved wear resistance, fatigue and toughness [2]. The composite materials are less expensive than the conventional materials. The matrix is the continuous phase binding and keeping the reinforcements in position and orientation, transferring the load to and between the reinforcements and protecting reinforcement from the environment and handling. Further, the matrix determines the overall service temperature limitations of composites as well as their resistance to environment. The major metal matrices used for the fabrication of composites include aluminium, magnesium, titanium and copper based alloys [3]. The other matrices studied are based on zinc, tin, steel, super alloys and inter-metallics. Among the various matrix materials available, aluminium and its alloys are widely used for the fabrication of MMC due to the fact that they are light in weight, economically viable, amenable for production of composites by various processing techniques and possess high specific strength and good corrosion resistance. In the case of aluminium, both cast and wrought alloys are commonly used. The important characteristics of the reinforcement in a composite material are to increase the mechanical properties. Reinforcements are the second phase materials added to the matrix alloy, which normally enhance the strength, stiffness, wear and creep resistance of the composites. The choice of reinforcements always