ABSTRACT This paper demonstrates the enhancement of mechanical properties and effective optimization of pulsed GTAW process parameters on aluminium alloy 6061 using sinusoidal AC wave with argon plus helium gas mixtures. Modified Taguchi Method (MTM) was employed to formulate experimental layout and to study effect of process parameter optimization on mechanical properties of the weld joints. Microstructural characterization of weld joint was carried out to understand the structural property correlation with process parameters.
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nullP. Kumar, K. Kolhe, S. Morey and C. Datta, "Process Parameters Optimization of an Aluminium Alloy with Pulsed Gas Tungsten Arc Welding (GTAW) Using Gas Mixtures," Materials Sciences and Applications, Vol. 2 No. 4, 2011, pp. 251-257. doi: 10.4236/msa.2011.24032.
 T. Senthilkumar, V. Balasubramanian and M. Y. S. Babu, “Effect of Pulsed Current GTAW Parameters on Fusion Zone Microstructure of AA6061,” International Journal of Metals & Materials, Vol. 13, No. 4, 2007, pp. 345-351.
 S. C. Juang and Y. S. Tarng, “Process Parameter Selection for Optimizing the Weld Pool Geometry in the TIG Welding of Stainless Steel,” Journal of Material Process Technology, Vol. 122, No. 1, 2002, pp. 33-37. doi:10.1016/S0924-0136(02)00021-3
 A. A. Mohamed, “Optimisation of Weld Bead Dimensions in GTAW of Al-Mg Alloy,” Materials and Manufacturing Processes, Vol. 16, No. 5, 2001, pp. 725-736.
 M. Balasubramanian, V. Jayabalan and V. Balasubramanian, “Optimizing the Pulsed Current GTAW Parameters to Attain Maximum Impact Toughness,” Materials and Manufacturing Processes, Vol. 23, No. 1-2, 2008, pp. 69-73. doi:10.1080/10426910701524584
 R. E. Leitner, H. Mcelhinney and E. I. Pruitt, “Aninvestigation of Pulsed Welding Variables,” Welding Journal, Vol. 52, No. 9, 1973, pp. 405-410.
 G. M. Reddy, A. A. Gokhale and K. P. Rao, “Optimization of Pulse Frequency in Pulsed Current Gas Tungsten Arc Welding of Aluminium-Lithium Alloy Sheets,” Journal of Material Science and Technology, Vol. 14, 1998, pp. 61-66.
 R. Manti, D. K. Dwivedi and A. Agarwal, “Microstructure and Hardness of Al-Mg-Si Weldments Produced by Pulse GTA Welding,” International Journal of Advance Manufacturing Technology, Vol. 36, No. 3-4, 2008, pp. 263-269. doi:10.1007/s00170-006-0849-z
 Y. S. Tarng and W. H. Yang, “Optimization of the Weld Bead Geometry in GTA Welding by the Taguchi Method,” International journal of Advance Manufacturing Technology, Vol. 14, 1998, pp. 549-554.
 A. Kumar and S. Sundarrajan, “Optimization of Pulsed TIG Welding Process Parameters on Mechanical Properties of AA 5456 Al Alloy Weldments,” Materials and Design, Vol. 30, No. 4, 2009, pp. 1288-1297. doi:10.1016/j.matdes.2008.06.055
 A. Kumar and S. Sundarrajan, “Selection of Welding Process Parameters for the Optimum but Joint Strength of an Aluminum Alloy,” Material and Manufacturing Process, Vol. 21, No. 8, 2006, pp. 789-793.
 M. Balasubramanian and V. Balasubramanain, “Process Parameter Optimisation of the Pulsed GTAW of Titanium Alloy,” Journal of Material Science and Technology, Vol. 24, No. 3, 2008, pp. 423-426.