Manufacturing Technology Today

P. V. R. Ravindra Reddy ¹, P. Radhakrishna Prasad ¹, A. A. Sriramakrishna ¹, P. Prabhakar Reddy ¹, N. V. Srinivasulu ¹

Affiliations
1 Department of Mechanical Engineering, CBIT, Gandipet, Hyderabad, IN

Abstract

Tungsten Inert Gas (TIG) welding is commonly used to weld thin sections of stainless steel and non-ferrous metals such as Aluminium, Magnesium, and Copper alloys. Stainless steels are widely used by many manufacturing industries for automobile parts, pressure vessels etc, due to their good corrosion resistance properties. TIG welding process grants the operator greater control over the weld than competing processes allowing for stronger, higher quality welds. Literature survey indicates that the flow rate of the inert gas, ischolar_main gap and the current are the control factors for the required bead geometry. In this work, the effect of flow rate and current on bead geometry of AISI 304 weldments is studied. The most influencing parameters are determined by the experiments carried out using L-9 orthogonal array. Results are analysed using ANOVA. Radiography is carried out, tensile and hardness test is conducted on defect free samples and the optimum parameters are obtained.

Keywords

TIG, Orthogonal Arrays, Taguchi, ANOVA.

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P. V. R. Ravindra Reddy ¹, B. Chenna Kesava Rao ¹, A. A. Sriramakrishna ¹, Poojita Kotha ¹, D. Amani Reddy ¹

Affiliations
1 Dept. of Mech Engg., CBIT, Gandipet, Hyderabad, IN

Abstract

Tungsten inert gas (TIG) welding is commonly used to weld thin sections of stainless steel and non-ferrous metals such as Aluminium, Magnesium, and Copper alloys. The process grants the operator greater control over the weld than competing processes allowing for stronger, higher quality welds. Literature survey indicates that the flow rate of the inert gas and the current are the control factors for the required bead geometry. In this work, the effect of flow rate and current on bead geometry of mild steel weldments is studied. The most influencing parameters are determined by the experiments carried out using L-9 orthogonal array. Results are analysed using column effect method and S/N analysis.

Keywords

TIG, Orthogonal Arrays, Taguchi, S/N Analysis, Column Effect Method.

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