American Journal of Mechanical Engineering
ISSN (Print): 2328-4102 ISSN (Online): 2328-4110 Website: Editor-in-chief: Kambiz Ebrahimi, Dr. SRINIVASA VENKATESHAPPA CHIKKOL
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American Journal of Mechanical Engineering. 2013, 1(6), 155-160
DOI: 10.12691/ajme-1-6-2
Open AccessArticle

Development of RSM Model in Surface Modification of EN-31 Die Steel Material Using Copper-Tungsten Powder Metallurgy Semi-Sintered Electrodes by EDM Process

H. S. Sidhu1, , S. S. Banwait2 and S. C. Laroiya2

1Department of Mechanical Engineering, SBAS Government Polytechnic College, Badbar, India

2Department of Mechanical Engineering, National Institute of Technical Teachers Training and Research, Chandigarh, India

Pub. Date: November 29, 2013

Cite this paper:
H. S. Sidhu, S. S. Banwait and S. C. Laroiya. Development of RSM Model in Surface Modification of EN-31 Die Steel Material Using Copper-Tungsten Powder Metallurgy Semi-Sintered Electrodes by EDM Process. American Journal of Mechanical Engineering. 2013; 1(6):155-160. doi: 10.12691/ajme-1-6-2


Electrical discharge machining is a well-established non-traditional machining process and it has been used extensively in tool and die making industry to machine complicated contours in electrically conductive hard materials. Surface modification by using metal powder mixed in dielectric fluid or by using reverse polarity semi-sintered/sintered powder metallurgy tool electrode is an uncommon aspect of electrical discharge machining process. In present work attempts have been made to model the surface modification phenomenon by electrical discharge machining process with response surface methodology technique. Two output response parameters, surface deposition rate and surface roughness has been correlated with four input variables, peak discharge current, pulse-on time, pulse-off time, powder compaction pressure and results obtained have been discussed. Design of experiment techniques, response surface methodology and analysis of variance were carried out to model the pertinent process parameters. The average prediction errors of the developed models confirms very well with the experimental values.

electrical discharge machining response surface methodology design of experiments analysis of variance surface deposition rate surface roughness

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[1]  Ho, K.H. and Newman, S.T, “State of the art electrical discharge machining (EDM),” International Journal of Machine Tools and Manufacture, 43, 1287-1300, June 2003.
[2]  Singh, S., Maheshwari, S. and Pandey, P.C, “Some investigations in to the electrical discharge machining of hardened tool steel using different electrode materials, J Mater Process Technol, 149, 272-277, Nov 2004.
[3]  Barash, M.M. and Kahlon, C.S, “Experiments with electric spark toughening, International Journal of Machine Tool Design & Research, 4, 1-8, June 1964.
[4]  Venkatesh, V.C. and Parasnis, S, “Surface transformation in high speed steel after electro discharge machining,” Proceedings of the 5th AIMTDR Conference , IIT Rookee, India, 639-649, 1972.
[5]  Koshy, G., Philip, P.K. and Geddam, A, “Hardening of surface layers using electric discharge techniques.” Proceedings of the11th AIMTDR Conference, IIT, Madras, 315-319, 1983.
[6]  Furutani, K., Saneto, A., Takezawa, Y., Mohri, N. and Miyke, H, “Accretion of titanium carbide by electrical discharge machining with powder suspended in working fluid,” Journal of International Societies for Precision Engineering, 25, 138-144, March 2001.
[7]  Bing, H. Y., Chung, T. H. and Yuan, H. F, “The effect in EDM of a dielectric of a urea solution in water on modifying the surface of titanium,” International Journal of Machine Tools and manufacture, 45, 194-200, July 2005.
[8]  Sharif, S. and Noordin, R.M, “Machinability modeling in powder mixed dielectric EDM of titanium alloy Ti6246,” Proceeding of the first international conference and seventh AUN/SEED-net Fieldwise Seminar on Manufacturing and Material Processing, Kuala Lumpur, 133-138. March 2006.
[9]  Kansal, H.K., Singh, S. and Kumar, P, “Parametric optimization of powder mixed electrical discharge machining by response surface methodology,” J Mater Process Technol, 169, 427-436, March 2005.
[10]  Sony, J.S. and Chakraverti, G, “Experimental investigations on migration of material during EDM of T215 Cr12 die steel,” Journal of materials Processing Technology, 56, 439-451, January 1996.
[11]  Mohri, N., Saito, N. and Tsunekawa, Y, “Metal surface modification by electrical discharge machining with composite electrode,” Ann CIRP 42, (1), 219-222, 1993.
[12]  Montgomery, D.C, Design and Analysis of Experiments, John Wiley and Sons, New York, 2001.
[13]  Baraskar, S.S., Banwait, S.S. and Laroiya, S.C, “Multi-objective optimization of electrical discharge machining process using Derringer’s desirability,” Int. J. Materials Engineering Innovation, 2, 203-221, October 2011.