Numerical Analysis of the Electro-discharge Machining Process for Alumina-Titanium Carbide Composite II. Unsteady State Approach

Young-Cheol Ahn; Young-Seup Chung

Korean Journal of Chemical Engineering, Vol.19, No.4, 694-702, July, 2002

Young-Cheol Ahn^†, and Young-Seup Chung

Division of Chemical Engineering, Kyungnam University, Masan 631-701, Korea

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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 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.

Keywords:Electro-Discharge Machining;Alumina;Titanium Carbide;Unsteady State Analysis;Finite Element Method

[References]

Ahn YC, Chung YS, Wang DH, Yun J, HWAHAK KONGHAK, 35(6), 850 (1997)
Bird RB, Stewart WE, Lightfoot EN, "Transport Phenomena," Wiley, New York (1960)
Bromley LA, Chem. Eng. Prog., 46(5), 221 (1950)
Dharmadhikari SW, Sharma CS, "Determination of Material Removal in EDM using a Multiple Heat Source Model," IX AIMTDR Conference, IIT, Kanpur, 316 (1980)
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)

[Referenced By]

[1] Ahn YC, Chung YS, Wang DH, Yun J, HWAHAK KONGHAK, 35(6), 850 (1997)

[2] Bird RB, Stewart WE, Lightfoot EN, "Transport Phenomena," Wiley, New York (1960)

[3] Bromley LA, Chem. Eng. Prog., 46(5), 221 (1950)

[4] Dharmadhikari SW, Sharma CS, "Determination of Material Removal in EDM using a Multiple Heat Source Model," IX AIMTDR Conference, IIT, Kanpur, 316 (1980)

[5] Gadalla AM, Cheng YM, Conf. Mach. Comp. Mater. II, 17 (1993)

[6] Jilani ST, Pandey PC, Precision Eng., 4(4), 215 (1982)

[7] Jilani ST, Pandey PC, J. Eng. Prod., 6, 123 (1983)

[8] Madhu P, Jain VK, Sundararajan T, Comput. Eng., 2, 121 (1991)

[9] Pandit SM, Rajurkar KP, J. Heat Transf., 105, 555 (1983)

[10] Reddy JN, "An Introduction to the Finite Element Method," 2nd ed., McGraw-Hill, NY (1993)

[11] Snoeys R, VanDyck F, Annals CIRP, 20(1), 35 (1971)

[12] Wang DH, Woo JY, Yun J, Ahn YC, J. Korean Soc. Prec. Eng., 14(9), 80 (1997)

[13] Yun J, Wang DH, Ahn YC, Go C, J. Korean Ceram. Soc., 34(10), 1092 (1997)