Processing methods and property evaluation of Al 2 O 3 and SiC reinforced metal matrix composites based on aluminium 2xx
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Processing methods and property evaluation of Al2O3 and SiC reinforced metal matrix composites based on aluminium 2xxx alloys P. Ashwatha) and M. Anthony Xavior Manufacturing Department, School of Mechanical Engineering, VIT University, Vellore-632014, India (Received 8 January 2016; accepted 14 March 2016)
Powder metallurgy processing of aluminum alloy based metal matrix composites (MMC) is realized to be a promising alternative as expected to advance rapidly compared to other conventional methods. This paper reviews the extensive development in metal–matrix composite research works with particular focus on aluminum alloys 2xxx series as metal–matrix particulates processed by powder metallurgy route. Effect of reinforcement materials such as SiC and Al2O3 on the mechanical properties of the composites manufactured through conventional methods and powder metallurgy route are compared and presented. The influence of percentage of reinforcement material on the overall properties of the MMC’s as reported by the researchers are presented. Summary on fundamental aspects of manufacturing MMC’s via powder metallurgy route, the effect of mechanical properties, tribological properties, and microstructural properties are presented. Eventually, some advantages of powder metallurgy method are mentioned which may substantiate the claim to consider this as a novel method for near net shape manufacturing.
I. INTRODUCTION
Metal–matrix composites (MMCs) are engineered mixture of two or more materials (one of which must be a metal) where, tailored properties are attained by systematic processing of different elements. Compared to aluminum composites, conventional monolithic alloy materials have limitations in respect to achievable blends of strength, stiffness, and density. Engineered MMCs consisting of reinforcement particles in a matrix metal achieve improvements of very high strength and mechanical properties. Besides, efficient blueprint and manufacturing techniques allow exceptional varieties of mechanical properties in composites like high strength, fatigue strength, compressible property, thermal coefficients, and friction coefficients and wear resistance. Fundamentally, MMCs consist of homogeneous or nonhomogeneous distribution of fibers, whiskers, or particles in a matrix material which improves necessary properties that is not achievable in monolithic alloys. Considering the manufacturing aspects of composite materials, where the volume and shape of component is governed by phase maps, for instance, aluminum alloys composites, can be produced by powder metallurgy route faster than any other conventional methods. The recent development in composites manufacturing diverge in
Contributing Editor: Jürgen Eckert a) Address all correspondence to this author. e-mail: [email protected] DOI: 10.1557/jmr.2016.131 J. Mater. Res., 2016
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the sense that any selected volume, shape, and size of reinforcement can be artificially introduced in the matrix. Conventional materials for in
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