• Aruna, M.
• Dhanalaksmi, V.

Abstract

nconel 718, a nickel based super-alloy is an extensively used alloy, accounting for about 50% by weight of materials used in an aerospace engine, mainly in the gas turbine compartment. This is owing to their outstanding strength and oxidation resistance at elevated temperatures in excess of 5500 C. Machining is a requisite operation in the aircraft industries for the manufacture of the components especially for gas turbines. This paper is concerned with optimization of the surface roughness when turning Inconel 718 with cermet inserts. Optimization of turning operation is very useful to reduce cost and time for machining. The approach is based on Response Surface Method (RSM). In this work, second-order quadratic models are developed for surface roughness, considering the cutting speed, feed rate and depth of cut as the cutting parameters, using central composite design. The developed models are used to determine the optimum machining parameters. These optimized machining parameters are validated experimentally, and it is observed that the response values are in reasonable agreement with the predicted values. ; Other ; {"references": ["M. Rahman, W. K. H. Seah and T.T. Teo 1997 \"The machinability of 718\", Journal of Material Processing Technology, vol. 63,.199-204, 1997.", "G. A Hassan, S. M. A. Suliman, \"Experimental modelling and of turning medium carbon steel\", International Journal of Research, vol. 28 (2), pp. 1057 - 1065, 1998.", "M. Y. Noordin, V. C. Venkatesh, S. Sharif, S. Elting and A. Abdullah,\"Application of response surface methodology in describing the of coated carbide tools when turning AISI 1045 steel\" of Materials Processing Technology, vol. 145, pp. 46-58, 2004.", "K. Taramen, \"Multi-machining output multi independent variable research by response surface methodology\", International of Production Research, vol. 12 (2), pp. 233 - 245, 1974.", "M. Alauddin, M. A. El Baradie, M. S. J. Hashmi, \"Optimization of finish in end milling Inconel 718\", Journal of Material and Technology, vol. 56, pp. 54 - 65, 1996.", "I. A. Choudhury, M. A. El-Baradie, \"Machinability assessment of 718 by factorial design of experiment coupled with response methodology\", Journal of Material Processing and Technology, pp. 30 - 39, 1999.", "Mansour, H. Abdalla, \"Surface roughness model for end milling: a semifree carbon case hardening steel (EN32) in dry condition\", of Materials Processing Technology, vol. 124, pp. 183 - 191,.", "H. Oktem, T. Erzurumlu and H. Kurtaran, \"Application of response methodology in the optimization of cutting conditions for roughness\", Journal of Material Processing and Technology, vol., pp. 11 - 16, 2005.", "S. Sharif, A. S. Mohruni, M. Y. Noordin, V. C. Venkatesh,\"Optimization of surface roughness prediction model in end milling alloy (Ti-6Al-4V)\", Proceeding of ICOMAST, 2006, pp.55-59."]}

Topics

• impedance spectroscopy
• surface
• Carbon
• nickel
• experiment
• grinding
• milling
• strength
• carbide
• composite
• case-hardened steel