EVALUATION OF HARDNESS AND DENSITY OF AL 6061 NICKEL COATED CENOSPHERE COMPOSITES
Keywords:
Nickel coated cenospheres, Electroless nickel coating, Aluminium 6061, CompositesAbstract
In recent years, among all the aluminium alloys, Al6061 is gaining much popularity as a matrix material to prepare metal matrix composites owing to its excellent mechanical properties and good corrosion resistance. Fly ash cenospheres are primarily a by-product in power generation plants. Research is in progress to effectively use this by-product to produce new usable and profitable materials as they pose major disposal and environmental problems. The present investigation is aimed at development of metal coated cenosphere reinforced Al6061 composites and to characterize their mechanical properties. Al6061 nickel coated composites have been prepared by liquid metallurgy route by varying percentage of nickel coated cenospheres between 2-10% by weight in steps of 2%. Microstructural studies, density and hardness evaluation of the composites is carried out. It is observed that there is an increase in the values of hardness and density of the composites with an increasing percentage of the nickel coated cenosphere reinforcements.
Downloads
References
Asthana R and Rohatgi P K (1993), “On the melt infiltration of plain and nickel-coated with Aluminum alloys”, Journal of Material Science Letters, Vol. 11, 442–445.
Chang S V and Lin S J (1996), “Fabrication of SiCp reinforced copper matrix composites by electroless copper plating”, Scientific Materials, Vol. 35, 225-231.
Ramesh C S, Anwar Khan A R and Safiulla M (2003), “Wear and Corrosion Behaviour of Al6061-TiO2 Composites”, Material Science Forum, Vol. 437–438, 317 – 320.
Taneoka, Odawara O, and Kaieda Y (1989, “Combustion synthesis of the titanium–aluminum-boron system”, Journal of American Ceramic Society, Vol. 72, 1047–1049.
Anwar Khan A R, Ramesh C S and Ramachandra A (2002), “Heat Treatment of Al6061-SiC composites”, Proceedings of the International Conference on Manufacturing,21-28.
Sahin Y and Acelar M (2003), “Production and properties of SiCp reinforced aluminium alloy composites”, Composites A, Vol. 34, 709-718.
McDanels D L (1985), “Analysis of stress-strain, fracture and ductility behaviour of aluminium matrix composites containing discontinuous silicon carbide reinforcement”, Metal Transactions A, Vol. 16, 1105.
Ramesh C S, Keshavamurthy R, Channabasappa B H and Ahmed A (2009), “Microstructure and mechanical properties of Ni–P coated Si3N4 reinforced Al6061 composites”, Material Science& Engineering. A, Vol. 502, 99-106.
Axen N, Alahelisten A, and Jacobson S (1994), “Abrasive wear of alumina fiber-reinforced aluminium”, Wear, Vol. 173, 95-104.
Ganesh V V, Lee C K and Guptha M (2002), “Enhancing the tensile modulus and strength of an aluminum alloy using interconnected reinforcement methodology”, Material Science& Engineering. A, Vol. 333, 193-198.
Moustafa Z F (1995), “Wear and Wear Mechanisms of Al- 22%Si/Al2O3 Composite”, Wear, Vol. 185, 189-195.
Zhang Z F, Zhang L C and Mai Y W (1994), “Wear of ceramic particle-reinforced metal-matrix composites. I. Wear mechanisms”, Journal of Material Science, Vol. 30, 1961-1966.
Luster W, Thumann M, and Baumann R (1993), “Mechanical properties of Aluminium alloy 6061-Al2O3 composites”, Material ScienceTechnology, Vol. 9, 853 – 862.
Ramesh C S, Ahamed A, Channabasappa B H, Keshavamurthy R (2010), Development of Al 6063–TiB2 in situ composites, Materials & Design, Vol. 31, 2230-2236.
