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Parametric Optimization and Interaction Effect of TIG Welding Parameters for Stainless Steel (SS 301) Sheets

Krishnan M. P., Sait A. N.

Mechanics and Mechanical Engineering

2015

Vol. 19, nr 2

91--101

In the present work, TIG welding process parameters were optimized for joining 301 stainless–steel plates. Welding pressure, welding speed and welding temperature combinations were carefully selected with the objective of producing weld joint with maximum impact strength and hardness. Taguchi technique was applied for optimizing the selected welding parameters. The factors used in this study consisted of pressure, welding speed and welding temperature, each of which had three levels in the study. L27 orthogonal array was selected according to the aforementioned factors and levels and experimental tests were performed. Signal-to-noise (SN) ratio was used to evaluate the experimental results. The results indicate that the welding speed has the greatest influence on impact strength, followed by welding pressure and temperature. Experiments have also been conducted to validate the optimized parameters.