TAGUCHI APPROACH FOR MODELING THE EFFECT OF SENSITIZATION IN PULSED TIG WELDING OF 316L
Keywords:
Taguchi Design, PTIG Welding, Sensitization, Skip WeldingAbstract
In the present work Taguchi based design has been used to study the effect of sensitization in pulsed mode of tungsten inert gas (PTIG) welding for austenitic stainless steel (316L). Further comparison of Taguchi design based model has been made with conventional skip mode of tungsten inert gas (TIG) welding. Taguchi design (L-9 orthogonal array) has been used for experimentation at three levels of current (90 Amp, 100 Amp and 110 Amp), frequency (4 Hz, 6 Hz and 8 Hz) and gas flow rate (10 L/min, 15 L/min and 20 L/min). The results of study suggests that better mechanical properties are attained at 100 Amp peak current, 8 Hz frequency and 10 L/min gas flow rate in PTIG welding. Experiment results have been counter verified with scanning electron microscopy (SEM) analysis, which shows least effect of sensitization at above mentioned levels of input parameters for PTIG welding. However as regards to sensitization is concerned skip mode of TIG welding results in to better option as compared to PTIG
Downloads
References
Parmar R S (2003), “Welding Processes and Technology”, Khanna Publishers, Delhi 45-50.
Kaur M (2007), “Study the Effect of Sensitization in TIG Welding of Austenitic Stainless Steel 316L”, M.Tech. Thesis of Punjab Technical University, Jalandhar, 23-29.
Sahlaoui H (2004), “Effects of Ageing Conditions on the Precipitates Evolution Chromium Depletion and Intergranular Corrosion Susceptibility of AISI 316L: Experimental and Modeling Results”, Materials Science and Engineering, Vol. 372, 98–108.
Singh R and Singh S (2008), “Experimental Investigations for Reducing Effect of Sensitization in Tungsten Inert Gas Welding”, Proc. of PVP 2008, ASME Pressure Vessels and Piping Division Conference, Chicago, Illinois, USA, July 27-31, 2008, 259-266.
Jain J, Singh R and Singh M (2008), “Modeling the Effect of Sensitization in Pulsed TIG Welding of Austenitic Stainless Steel” Proc. of 2nd International and 23rd All India Manufacturing Technology, Design and Research conference, IIT Madras, Chennai, Dec. 15-17, 2008, 19-24.
Dhami M K, Singh R and Singh S (2007), “Effect of Sensitization in TIG Welding of Austenitic Stainless Steel 316L”, Proc. of National Conference on Advances in Materials and Manufacturing Technology (AMMT-2007), at Punjab Engineering College, Chandigarh, India, September 21-22, 2007,154-157.
Vasudevan M, Raj B and Rao P K (2005), “'Development of Neural Network Models for the Prediction of Solidification Mode, Weld Bead Geometry and Sensitization in Austenitic Stainless Steel”, Nuclear Energy Science and Technology, Vol. 1, (2/3), 232-245.
Shafy M (2005), “Embrittlement Prediction of Aged Austenitic Stainless Steel Welded Components Using Hardness Measurement”, Egypt Journal Solids, Vol. 28(2), 325-335.
Yaghi A, Becker A (2004), “State of Art Review-Weld Simulation using Finite Element Method”, Report Fenet-Unott-Dle-08, Nottingham university, 1-27.
