A Comparative Study of EDD and PM-EDD in Producing Holes in Inconel 718 Alloy

Abstract:

In recent times, aerospace, chemical industries and nuclear plant have usually used Inconel 718 alloy because of its excellent mechanical and chemical properties at elevated temperatures. It falls under the category of difficult-to-cut materials due to its high toughness, poor thermal conductivity and high hardness. The set-ups for electric discharge drilling (EDD) and powder-mixed electric discharge drilling (PM-EDD) were developed, and experiments were conducted on them separately. This research shows a comparative study amid producing holes by EDD and PM-EDD in Inconel 718 alloy workpiece with copper tool electrode. SiC was used as an abrasive powder because of its better thermal conductivity in order to get properly mixed with dielectric in a separate tank. Output response was assessed in the form of material removal rate, under the influence of discharge current, duty factor, pulse-on-time and tool speed, as the input parameters.

• Periodical: Key Engineering Materials (Volume 833)
• Pages: 48-53
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.833.48
• Online since: March 2020
• Authors: Rahul Davis, Abhishek Singh*, Sabindra Kachhap, Neeraj Nath
• Keywords: Electric Discharge Drilling, Electric Discharge Machining, Input Parameters, Material Removal Rate, Powder-Mixed Electric Discharge Drilling

References

[1] A. Singh, P. Kumar, and I. Singh, Electric discharge drilling of metal matrix composites with different tool geometries, Proc IMechE Part B J Engineering Manufacture, vol. 227, pp.1245-1249 (2013).

DOI: 10.1177/0954405413484726

[2] S. Kachhap, A. Singh, and K. Debnath, Electric discharge drilling of hybrid metal matrix composites using different tool electrodes, J Sci Ind Res, vol. 77, pp.325-429 (2018).

[3] S. Patel, D. Thesiya, and A. Rajurkar, Aluminium powder mixed rotary electric discharge machining (PMEDM) on Inconel 718, Australian J of Mechanical Engineering, vol. 16 (1), p.21–30 (2018).

DOI: 10.1080/14484846.2017.1294230

[4] M.L. Jeswani, Effect of the addition of graphite powder to kerosene used as the dielectric fluid in electrical discharge machining, Wear, vol. 70, pp.133-139 (1981).

DOI: 10.1016/0043-1648(81)90148-4

[5] G. Koshy, P.K. Philip, and A. Geddam, Hardening of surface layers using electric discharge techniques, Proc. of the 11th AIMTDR Conference IIT Madras India, pp.315-319 (1983).

[6] Y.S. Wong, L.C. Lim, I. Rahman, and W.M. Tee, Near-mirror-finish phenomenon in EDM using powder-mixed dielectric, J Mate Processing Tech, vol. 79, pp.30-40 (1998).

DOI: 10.1016/s0924-0136(97)00450-0

[7] Y.F. Tzeng, and C.Y. Lee, Effects of powder characteristics on electro discharge machining efficiency, Int J Adv Manuf Technol, vol. 17, pp.586-592 (2001).

[8] P. Pecas, and E. Henriques, Influence of silicon powder-mixed dielectric on conventional electrical discharge machining, Int J Mach Tool Manu, vol. 43, pp.1465-1471 (2003).

DOI: 10.1016/s0890-6955(03)00169-x

[9] H.K. Kansal, S. Singh, and P. Kumar, Parametric optimization of powder mixed electrical discharge machining by response surface methodology, J Mate Processing Tech, vol. 169, pp.427-436 (2005).

DOI: 10.1016/j.jmatprotec.2005.03.028

[10] M.P. Jahan, M. Rahman and Y.S. Wong, Modelling and experimental investigation on the effect of Nano-powder-mixed dielectric in micro-electro discharge machining of tungsten carbide, Proc IMechE Part B J Engineering Manufacture, vol. 224, pp.1725-1739 (2010).

DOI: 10.1243/09544054jem1878

[11] B. Mohan, A. Rajadurai, and K.G. Satyanarayana, Electric discharge machining of Al-SiC metal matrix composites using rotary tube electrode, J Mate Processing Tech, vol. 153-154, pp.978-985 (2004).

DOI: 10.1016/j.jmatprotec.2004.04.347

[12] S. Daneshmand, V. Monfared, and A.L. Neyestanak, Effect of tool rotational and Al2O3 powder in electro discharge machining characteristics of NiTi-60 shape memory alloy, Silicon, vol. 9, pp.273-283 (2017).

DOI: 10.1007/s12633-016-9412-1

[13] S.Tripathy and D.K. Tripathy, Multi-response optimization of machining process parameters for powder mixed electro-discharge machining of H-11 die steel using grey relational analysis and TOPSIS, Mach Sci Technol, vol. 21, pp.362-384 (2017).

DOI: 10.1080/10910344.2017.1283957

[14] B.T. Long, N.H. Phan, N. Cuong, and V. S. Jatti, Optimization of PMEDM process parameter for maximizing material removal rate by Taguchi's method, Int J Adv Manuf Technol, vol. 87, pp.1929-1939 (2016).

DOI: 10.1007/s00170-016-8586-4

[15] H.K. Kansal, S. Singh, and P. Kumar, Technology and research developments in powder mixed electric discharge machining (PMEDM), J Mate Proc. Tech, vol. 184, pp.32-41 (2007).

DOI: 10.1016/j.jmatprotec.2006.10.046

[16] H. K. Kansal, S. Singh, S. and P. Kumar, Effect of silicon powder mixed EDM on machining rate of AISI D2 die steel. J Manuf Process, vol. 9(1), pp.13-22 (2007).

DOI: 10.1016/s1526-6125(07)70104-4

[17] S. Ľuboslav, H. Slavomíra, Study of tool electrode wear in EDM process, Key Eng Mater, vol. 669, pp.302-310 (2016).

[18] N. Matthew, D. Kumar, Study of tool wear rate of different tool materials during electric discharge machining of H11 steel at reverse polarity, Int J Mech Engg & Rob Res, vol. 3, pp.53-63 (2014).