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Experimental investigations on the SiO2 flux-assisted GTA welding of super-austenitic stainless steels

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Abstract

This study addressed the use of activated flux SiO2 for the gas tungsten arc (GTA) welding of super-austenitic stainless steel plates of 5 mm thickness. Trials were carried out to investigate the effect of flux and the welding current to determine the depth of penetration. Bead-on-plate trials were carried out on the AISI 904L with and without flux. It was inferred from the macrostructure studies that with a welding current of 180 A, complete penetration could be achieved using flux-assisted GTA welding. The optimal process parameters were validated by conducting the experimental investigations to ascertain the structure–property relationships of flux-assisted GTA weldment. Experimental results corroborated that the average tensile strength and impact toughness of SiO2 flux-assisted GTA weldments of AISI 904L were observed as 553 MPa and 49.3 J. It was inferred from the studies that defect-free welds of super-austenitic stainless steel could be obtained on employing flux-assisted GTA welding process.

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Authors and Affiliations

  1. School of Mechanical & Building Sciences, VIT University, Vellore, 632014, India

    K. Devendranath Ramkumar, Jelli Lakshmi Narasimha Varma, Gangineni Chaitanya, S. Logesh, Madhav Krishnan & N. Arivazhagan

  2. Department of Mechanical Engineering, NIT, Tiruchirappalli, 620002, India

    N. Siva Shanmugam

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  1. K. Devendranath Ramkumar
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  2. Jelli Lakshmi Narasimha Varma
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  3. Gangineni Chaitanya
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  4. S. Logesh
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  5. Madhav Krishnan
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  6. N. Arivazhagan
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  7. N. Siva Shanmugam
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Correspondence to K. Devendranath Ramkumar.

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Ramkumar, K.D., Varma, J.L.N., Chaitanya, G. et al. Experimental investigations on the SiO2 flux-assisted GTA welding of super-austenitic stainless steels. Int J Adv Manuf Technol 93, 129–140 (2017). https://doi.org/10.1007/s00170-015-7876-6

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  • DOI: https://doi.org/10.1007/s00170-015-7876-6

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