Document Type: Research Paper

Authors

1 NIT KURUKSHETRA

2 Professor, Mechanical Engineering Department, NIT Kurukshetra, India

3 Mechanical Engineering Deparrment, UIET, MDU, Rohtak, India

Abstract

The present research attempts to analyze the surface topography of WEDMed Inconel 825 with respect to surface crack density (SCDi) and recast layer thickness (RCLt). Formation of cracks, recast layer and heat-affected zone are the major issues in determining the final performance of WEDM machined sample. In this study, WEDM characteristics viz. pulse on time (Ton), pulse off time (Toff), gap voltage (SV), peak current (IP), wire tension (WT) and wire feed (WF) are optimized for response SCDi and RCLt by response surface methodology. The outcome manifested that the topography of the machined surface becomes more rough at increased value of Ton, IP and SV. RSM emerged as a great tool in the development of a predicted model based on desirability approach and finding optimal parametric combination which results in reduced SCDi and RCLt. At optimum combination of process parameters i.e. 109 machine unit Ton, 36 machine unit Toff, 54 V SV, 120A IP, 9 machine unit WT and 7 m/min WF, the values obtained for SCDi and RCLt were 0.00160 μm/μm2 and 20.991μm respectively with an error of less than 5%.

Graphical Abstract

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[1]. G.R. Thellaputta, S.C. Pulcharu, C.S.P. Rao, “Machinability of Nickel Based Superalloys: A Review”, Materials Today: Proceedings, Vol. 4, No. 2, pp. 3712-3721, (2017).

[2]. P. Kumar, Meenu, V. Kumar, “Optimization of Process Parameters for WEDM of Inconel 825 Using Grey Relational Analysis”, Decision Science letter, Vol. 7, No. 4, pp. 405-416, (2018).

[3].A.Singh, S.Anandita, S. Gangopadhyay, “Microstructural analysis and multi response optimization during ECM of Inconel 825 using hybrid approach”, Material and Manufacturing. Process, Vol. 30, No. 7, pp. 842-851, (2015).

[4].M.Y. Ali, A. Banu, M.A. Bakar, “Influence of Wire Electrical Discharge Machining (WEDM) process parameters on surface roughness”, Material Science Engineering, Vol. 290, doi:10.1088/1757-899X/290/1/012019, (2017).

[5].Y. Shen, Y. Liu, H. Dong, K. Zhang, “Surface integrity of Inconel 718 in high-speed electrical discharge machining milling using air dielectric”, International Journal of Advance Manufacturing Technology, Vol. 90, pp. 691-698, (2017).

[6]. Z. Zhang, W. Ming, H. Huang, “Optimization of process parameters on surface integrity in wire electrical discharge machining of tungsten tool YG15”, International Journal of Advanced Manufacturing Technology, Vol. 81,No.5-8, pp.1303–1317, (2015)

[7]. K. Kanlayasiri, S. Boonmung, “Effects of wire-EDM machining variables on surface roughness of newly developed DC 53 die steel: Design of experiments and regression model”, Journal of Materials Processing Technology, Vol. 192-193 No. 1, pp. 459-464, (2007).

[8]. C. Chuanliang, Z. Xianglin, Z. Xiang, D. Chunfa, “Surface Integrity of Tool Steels Multi-cut by Wire Electrical Discharge Machining”,  Procedia  Engineering, Vol. 81, pp.1945-1951, (2014).

[9]. N.Z. Khan, Z.A. Khan, A.N. Siddiquee, A.K. Chanda, “Investigations on the effect of wire EDM process parameters on surface integrity of HSLA: a multi-performance characteristics optimization”,  Prod. Manuf. Res, Vol. 2, No.1,  pp.501–518, (2014).

[10]. Z. Chen J. Moverare, R.L. Peng, S. Johansson, “Surface Integrity and Fatigue Performance of Inconel 718 in Wire electrical discharge machining, Procedia CIRP, Vol. 45, pp.307-310, (2016).

[11]. M.P. Garg, A. Kumar, C.K. Sahu, “Mathematical modeling and analysis of WEDM machining parameters of nickel-based super alloy using response surface methodology”, Sadhana Vol. 42, pp. 981–1005, (2017).

[12]. A.B. Puri, B. Bhattacharyya, “Modeling and analysis of white layer depth in a wire-cut EDM process through response surface methodology” International Journal of Advanced Manufacturing Technology, Vol. 25, No. 3-4, pp.301–307, (2005).

[13]. A. Goswami, J. Kumar, “Trim cut machining and surface integrity analysis of Nimonic 80A alloy using wire cut EDM”,  Engineering  Science and Technology, An international Journa,l  Vol. 20, No. 1, pp. 175–186, (2017).

[14].   L. Li, Y.B. Guo, X.T. Wei, W. Li, “Surface integrity characteristics in wire-EDM of inconel 718 at different discharge energy”, Procedia CIRP, Vol. 6, pp.220-225, (2013).

[15]. D.K. Aspinwall, S.L. Soo, A.E. Berrisford, G. Walder, “Workpiece surface roughness and integrity after WEDM of Ti6Al4V and Inconel 718 using minimum damage generator technology”, CIRP Annals, Vol. 57, No.1, pp.187-190, (2008).

[16]. A. Thakur, A. Mohanty, S. Gangopadhyay, K.P. Maity, “Tool wear and chip characteristics during dry turning of Inconel 825”  Procedia Materials Science, Vol. 5, pp. 2169-2177, (2014).

[17]. N. Tosun, H. Pihtili, “The Effect of Cutting Parameters on Wire Crater Sizes in Wire EDM” International Journal of Advanced Manufacturing Technology, Vol.21 857-865, (2003).

[18]. A.Kumar, V.Kumar, J.Kumar, “Surface crack density and recast layer thickness analysis in WEDM process through response surface methodology” Machining Science and Technology, Vol. 20,  pp. 201-230, (2016).

[19].P. Kumar, M.Gupta,V.Kumar, “Microstructural analysis and multiresponse optimization of WEDM of Inconel825 using RSM based desirability approach”Journal of the Mechanical Behavior of Materials, Vol. 28, pp. 39–61, (2019).

[20]. B. Khosrozadeh, M. Shabgard, “Effects of hybrid electrical discharge machining processes on surface integrity and residual stresses of Ti-6Al-4V titanium alloy”, International Journal of Advanced Manufacturing Technology. Vol. 93, pp.1999-2011, (2017).

[21]. D. Mishra, SAH. Rizvi, “Influence of EDM parameters on MRR, TWR and surface integrity of AISI 4340”, International Journal of Technical Research and Applications. Vol. 42, pp. 95-98, (2017).

[22].P. Kumar, M. Gupta, V. Kumar,“Experimental analysis of WEDM machined surface of Inconel 825 using single objective PSO” Journal of Physics: Conference Series, 1240 012053, pp.1-10, (2019).

[23]. P.S. Rao,K.Ramji,B.Satyanarayana,  “Effect of wire EDM conditions on generation of residual stresses in machining of aluminum 2014 T6 alloy”, Alexandria Engineering Journal, Vol.55, pp.1077-1084, (2016).

[24]. M. Kolli, A. Kumar, “Effect of dielectric fluid with surfactant and graphite powder on Electrical Discharge Machining of titanium alloy using Taguchi method”, Engineering  Science and Technology, An international Journal, Vol.18, pp. 524-535, (2015).

 

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