Publication Type : Journal Article
Publisher : Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, SAGE Publications Ltd
Source : Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, SAGE Publications Ltd, Volume 233, Issue 9, p.3208-3219 (2019)
Keywords : Adhesive wears, Adhesives, Bearings (machine parts), Brittleness, Centrifugal casting, Coefficient of frictions, Ductility, Energy dispersive x-ray, Fracture mechanics, Friction, Functionally graded, Functionally graded materials, Horizontal centrifugal castings, Mechanical and tribological properties, Microstructure analysis, Plasticity, scanning electron microscopy, Sliding velocities, Surface chemistry, Tensile strength, Tribology, Wear of materials
Campus : Coimbatore
School : School of Engineering
Department : Mechanical Engineering
Year : 2019
Abstract : The functionally graded Cu-11Ni-4Si/10wt%WC composite and its alloy have been synthesized using horizontal centrifugal casting technique to compare the mechanical and tribological improvement and its utility for bearings and bushes. Microstructure analysis and mechanical tests showed 43% improvement in hardness and 160% improvement in tensile strength at inner radial distances compared to the outer composite periphery. Fractural analysis showed ductility for alloy, whereas for composites, brittleness at outer and a combination of both ductility and brittleness were observed at inner. Proportional rise in the wear rate and coefficient of friction was observed with increasing load and sliding distances for both composite and alloy. Composite showed a slight decline in the wear rate and coefficient of friction with an increase in the sliding velocity, while alloy showed a linear rise. Worn surfaces analysis of composite showed the formation of oxide layers, which reduced the coefficient of friction at higher sliding velocity, resulting in lower wear rate. © IMechE 2018.
Cite this Research Publication : Dr. Radhika N, Reghunath, R., and Sam, M., “Improvement of mechanical and tribological properties of centrifugally cast functionally graded copper for bearing applications”, Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, vol. 233, no. 9, pp. 3208-3219, 2019.