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Received August 6, 2001
Accepted February 1, 2002
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Numerical Analysis of the Electro-discharge Machining Process for Alumina-Titanium Carbide Composite II. Unsteady State Approach
Division of Chemical Engineering, Kyungnam University, Masan 631-701, Korea
Korean Journal of Chemical Engineering, July 2002, 19(4), 694-702(9), 10.1007/BF02699320
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Abstract
The electrical discharge machining process of a ceramic composite material consisting of alumina and titanium carbide has been modelled as an unsteady state mathematical model and solved by using Galerkin’s implicit finite element method. For several selected currents and powers the spark melted and sublimated the workpiece to form a crater which gradually expanded outwards. The size and shape of the crater anticipated by the computation were in_x000D_
good agreement with the scanning electron micrograph of the crater formed in an experiment. An increased electric current and duty factor would increase the material removal rate in expense of roughened surface and deteriorated mechanical properties.
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References
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Gadalla AM, Cheng YM, Conf. Mach. Comp. Mater. II, 17 (1993)
Jilani ST, Pandey PC, Precision Eng., 4(4), 215 (1982)
Jilani ST, Pandey PC, J. Eng. Prod., 6, 123 (1983)
Madhu P, Jain VK, Sundararajan T, Comput. Eng., 2, 121 (1991)
Pandit SM, Rajurkar KP, J. Heat Transf., 105, 555 (1983)
Reddy JN, "An Introduction to the Finite Element Method," 2nd ed., McGraw-Hill, NY (1993)
Snoeys R, VanDyck F, Annals CIRP, 20(1), 35 (1971)
Wang DH, Woo JY, Yun J, Ahn YC, J. Korean Soc. Prec. Eng., 14(9), 80 (1997)
Yun J, Wang DH, Ahn YC, Go C, J. Korean Ceram. Soc., 34(10), 1092 (1997)
