Analysis of Mechanical Properties of AMC Fabricated by Vacuum Stir Casting Process
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ORIGINAL PAPER
Analysis of Mechanical Properties of AMC Fabricated by Vacuum Stir Casting Process Jagbir Singh 1 & C. S. Jawalkar 1 & R. M. Belokar 1 Received: 1 May 2019 / Accepted: 25 November 2019 # Springer Nature B.V. 2019
Abstract Silicon carbide-based Aluminum Metal Matrix Composites (AMMCs) are well accepted engineering materials for a wide range of applications specifically in the field of aerospace and automotive industries. These Metal Matrix Composites (MMCs) possess high strength, high stiffness, more thermal stability, more corrosion and wear resistance, and more fatigue life. Aluminum alloys are considered as good alternatives due to their unique properties and low weights. It is always a challenge to achieve accurate percentage distribution of the reinforcement particles inside the matrix, as it can affect the material property of the composite. The study presented in this paper comprises of development of a composite by adding silicon carbide in Aluminum alloy 6063 by 5%, 7.5%, 10%, 12.5% and 15% (of mass ratio) respectively through stir casting technique. The effect of size and weight fraction of SiC particulates on the microstructural and corrosion behavior of Al/SiC MMCs was studied and mechanical tests (such as hardness test, microstructure test) were conducted. The results further revealed that Al/SiC MMCs exhibited higher density than pure Al matrix. The micro-structural properties have been analyzed using Field Emission Scanning Electron Microscopy (FESEM) and its compositional distribution was analyzed using Energy Dispersive X-Ray Spectroscopy (EDS) and mapping techniques. The results revealed a homogenous particle distribution along with enhanced mechanical and micro-structural properties. Keywords Metal matrix composite (MMC) . Aluminum 6063 . SiC . Advanced stir casting . Microstructure
1 Introduction A keen interest to use aluminium based metal matrix composites has been observed since 1960’s. Aluminium is one of the most abundantly available materials on earth. It contributes to 8% of the earth’s crust. Aluminium and its alloys are widely used as the main matrix materials. Aluminium alloys have the versatile property of light weight and hence it enhances the researcher’s prodigious interest towards this technology [1]. Aluminium is malleable, ductile and can be transformed into various shapes. These Metal Matrix Composites (MMCs) typically use aluminium as the matrix material along with some ceramic reinforcement in such a way that it has certain improved properties than its parent monolithic aluminium. In order to improve the mechanical and tribological properties, * Jagbir Singh [email protected] 1
Department of Production and Industrial Engineering, Punjab Engineering College, Deemed to be University, Chandigarh 160012, India
the soft matrix of aluminium is mixed with hard particles of some carbides and oxides [2]. As reported earlier by Abdullah et al., particle reinforced Aluminium Metal Matrix Composites (AMMC’s) considerably improves its strength and hardness; howe
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