EFFECT OF MICROSTRUCTURE AND HARDNESS PROPERTIES OF AL2011 BASED COMPOSITES FOR TITANIUM DI BORIDE USING STIR CASTING METHOD
Journal Title: International Journal of Mechanical and Production Engineering Research and Development (IJMPERD ) - Year 2017, Vol 7, Issue 2
Abstract
Objectives Al-2011 base composite reinforced with TiB2 salts was successfully manufactured by the stir-casting technique. Conversion of the matrix with the inclusion of copper and titanium improved the mechanical properties. The analysis is attempted with the proportion of Al2011+K2TiF6+KBF4 using stir casting process, microstructures and hardness test is done. SEM-EDX and XRD investigation expose existence of fine TiB2 particles in before and after heat treatment both as cast and extruded condition. Methods/Statistical Analysis Aluminum 2011 material is fabricated by stir casting method with added titanium diboride on various weight percentage compositions. After, the developed composites were subjected to extrusion appearing in a heat of 400o C applying a 50 T hydraulic hit. Scanning electron microscopy-energy dispersive X-ray analysis (SEM-EDX) and X-ray diffraction (XRD) systems tests were carried out on as cast and extruded metal matrix composites. The investigation of microstructure of aluminum titanium diboride metal matrix composites with specific attention on the before, after as cast and extrusion behavior of the composites. Findings It is detected that, the couple as cast and extruded compound do exhibit significant grain refinement. Mean while after the secondary process as per the observation the grain reinforcement of the extruded composites reveal significant of 5%, 10% 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 intermetallic particles at the grain boundaries to restrict the deformation. This result improves the extrusion process heat treated samples well in grain enlightening and uniform particle distribution compared to as cast condition of samples. To compare the 5%, 10% as cast samples the plastic deformation process gives the 10% extruded heat treated samples with higher strength 84 to 90 HV. Application/Improvements It used in 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. When a compared with as cast matrix alloy and its composite, extruded alloy and its composite exhibits higher extent of grain refinement.
Authors and Affiliations
M. M. SIVA, R. RAJESH, S. PUGAZHENDHI, M. SIVAPRAGASH
Keywords
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