Multi-response optimization of wire electrical discharge machining process parameters for Al7075/Al2O3/SiC hybrid composite using Taguchi-based grey relational analysis

The effect of various wire electrical discharge machining process parameters such as pulse on time, pulse off time, pulse current and the wire drum speed on machined surface quality characteristics such as surface roughness and kerf width has been discussed. The experiments were carried out with L27 orthogonal array on hybrid metal matrix composite prepared by inert gas–assisted electromagnetic stir casting process using particulates 7.5% Al2O3 and 7.5% SiC each in Al7075 alloy. Taguchi-based grey relational analysis, a multi-response optimization technique, was used to find the optimal process parameter setting for the best quality machined characteristics. Results of analysis of variance showed that the order of significance was pulse on time, pulse current, pulse off time and the wire drum speed contributing 50.02%, 39.50%, 4.58% and 2.75%, respectively, while machining the hybrid composite. Confirmation test was carried out at selected optimal parameter setting, which showed improvement in grey relational grade, thus confirming the robustness of grey relational analysis.

[1]  Yu-Min Chiang,et al.  The use of the Taguchi method with grey relational analysis to optimize the thin-film sputtering process with multiple quality characteristic in color filter manufacturing , 2009, Comput. Ind. Eng..

[2]  L. N. Harris,et al.  Taguchi techniques for quality engineering, Philip J. Ross, Mcgraw-hill book company, 1988 , 1989 .

[3]  WenKun-Li,et al.  Applying Grey Relational Analysis and Grey Decision-Making to evaluate the relationship between company attributes and its financial performance-A case study of venture capital enterprises in Taiwan , 2007 .

[4]  R. Ramakrishnan,et al.  Modeling and multi-response optimization of Inconel 718 on machining of CNC WEDM process , 2008 .

[5]  Deng Ju-Long,et al.  Control problems of grey systems , 1982 .

[6]  J. Davim.  Machining of Metal Matrix Composites , 2012 .

[7]  Hong Hocheng,et al.  Improvement of fatigue life of electrical discharge machined AISI D2 tool steel by TiN coating , 2001 .

[8]  Ming-Chang Jeng,et al.  Optimization of turning operations with multiple performance characteristics using the Taguchi method and Grey relational analysis , 2009 .

[9]  Muthu Kumar,et al.  Optimization of the WEDM Parameters on Machining Incoloy800 Super alloy with Multiple Quality Characteristics , 2010 .

[10]  S. Jeelani,et al.  Effect of electric discharge machining on the fatigue life of Inconel 718 , 1988 .

[11]  Saurav Datta,et al.  Modeling, simulation and parametric optimization of wire EDM process using response surface methodology coupled with grey-Taguchi technique , 2010 .

[12]  H. Bisaria,et al.  Machining of Metal Matrix Composites by EDM and its Variants: A Review , 2015 .

[13]  Arunanshu S. Kuar,et al.  Hole characteristics optimization in Nd:YAG laser micro-drilling of zirconium oxide by grey relation analysis , 2012 .

[14]  Amar Patnaik,et al.  Parametric optimization of wire electrical discharge machining (WEDM) process using taguchi method , 2006 .

[15]  Nihat Tosun,et al.  A study on kerf and material removal rate in wire electrical discharge machining based on Taguchi method , 2004 .

[16]  Kapil Kumar,et al.  Multi-objective parametric optimization on machining with wire electric discharge machining , 2011, The International Journal of Advanced Manufacturing Technology.

[17]  Sandeep Grover,et al.  Simultaneous optimization of material removal rate and surface roughness for WEDM of WC-Co composite using grey relational analysis along with Taguchi method , 2011 .

[18]  D. M. R. Taplin,et al.  The turning of an Al/SiC metal-matrix composite , 1992 .

[19]  Madhan Shridhar Phadke,et al.  Quality Engineering Using Robust Design , 1989 .