Indian Journal of Science and Technology

Abstract

Objectives: Our aim of this project is to use aluminum titanium diboride metal matrix composites in aeronautical and marine field by reducing its weight and improve the hardness and corrosion behavior. For this aluminum titanium diboride compound are made by stir casting method. Methods/Statistical Analysis: Aluminum 2011 material is fabricated by stir casting method with added titanium diboride on various weight percentage compositions. The hardness and corrosion are developed with the raise in weight percentage of titanium diboride particles. The properties of reinforced metal matrix composites iron, copper, zinc, lead, silicon, bismuth and aluminim are the chemical composition of Al2011. The analysis of microstructure, corrosion and mechanical properties of aluminum titanium diboride metal matrix composites with specific attention on the before after as cast and extrusion behavior of the composites. Findings: Tensile test for the alloy and composite samples are done using Instron UTM. The tensile stress of the composites improves significantly with the TiB2 content. Micrograph of the heat treated composite samples taken at different locations from outer surface of the casting. Hardness tests are done using the Vickers hardness testing machine. The firmness characters of the precipitation conducted specimens are more than that of the as-cast samples. Meanwhile after the secondary process as per the observation the tensile stress of the extruded composites reveal 135M Pa improvement of 5% opposing the as cast samples. After raising the metal matrix composites to 10% was plastically deranged shows the value 171M Pa. The SEM of the extruded samples shows enlarged grains of aluminum solid solution with inter-metallic particles at the grain boundaries to restrict the deformation. This result improves the extrusion process well in grain enlightening and uniform particle distribution compared to as cast condition of samples. Compare to as cast samples the plastic deformation process gives the extruded samples with higher strength 47 to 60 BHN. Application/Improvements: Now a day’s Al-2011 is the top most non-ferrous metal used in sector multiple industrial applications like aerospace, marine, automotive, rail, building, packaging, energy distribution, sports and leisure, mechanical industries and engineering, etc. The nature of Al-2011 with TiB2 are lightness, corrosion resistance, suitability for surface treatments, the diversity of the alloys and intermediates, ease of use, recycling, electrical and thermal conductivity, etc 

Keywords: As Cast, Composition of TiB2, Extrusion, Hardness, Immersion, Microstructure, Stir Casting Method