Main Article Content
Abstract
The study focused on optimizing the physical and mechanical properties of TIG (Tungsten Inert Gas) welded joints on SS400 steel, which is essential to fulfill quality standards in the industry. The aim of this study is to analyze the influence of welding current with variations in values of 85 Amperes, 90 Amperes and 95 Amperes on the physical and mechanical properties of welded joints.The material used was SS400 steel with a thickness of 3 mm. The welding parameters used are AWS A5 12-80 tungsten electrode with a diameter of 2.4 mm, filler ER70S-6 with a diameter of 1.6 mm, argon shielding gas, flow rate 6 liters/minute, voltage 230 V, and welding speed 1.46 mm/s. From the results of the tests carried out, the welding steel that used a current of 95 Ampere has the best performance. The results of the tensile test showed that the tensile strength of this specimen was 390.3 MPa. This value is higher when compared to other current variations which have a value of 224.1 MPa for 85 Ampere and 235.2 MPa for 90 Ampere. In the toughness test, the specimen with a current of 95 Ampere showed the best impact value that reached 1.27 J/mm. Microstructure observation of the specimen showed a phase change where in the HAZ and raw metal regions there were a pearlite and ferrite, then due to the high heat in the welding area and the addition of fillers, the ferrite changed its phase to grain boundary ferrite, Acicular ferrite and Widmanstatten ferrite
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Copyright (c) 2025 Yustiasih Purwaningrum, Isal Alvianto, Reza Arief Sidiq
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References
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References
Cho, S., Jang, J. (2016). Strength analysis of die-cast aluminum-alloy brake pedals for use in lightweight cars, Journal of the Korean Society of Manufacturing Technology Engineers 25(2) 138–142.
Drastiawati, N. S. (2021). Pengaruh variasi arus listrik pengelasan tungsten inert gas (Tig) terhadap kekuatan tarik sambungan las pada stainless steel SS 304, Teknologi Terapan, Volume 3, Nomor 2.
Gurusamy, P., Prabu, S.B., Paskaramoorthy R. (2015). Influence of processing temperatures on mechanical properties and microstructure of squeeze cast aluminum alloy composites, Mater. Manuf. Process. 30 367–373.
Jayakrishnan, S., Chakravarthy, P. (2017) Flux bounded tungsten inert gas welding for enhanced weld performance—A review, Journal of Manufacturing Processes Volume 28, Part 1, August, Pages 116-130
Loder, D., Michelic, SK., Bernhard, C. (2017). Acicular ferrite formation and its influencing factors - A Review, Journal of Materials Science Research, Vol. 6, No. 1
Ming, L.Q., Hing,W.X., Da, Z.Z., Jun, W. (2007). Effect of activating flux on arc shape and arc voltage in tungsten inert gas welding. Transactions of Nonferrous Metal Society of China, 486–90.
Nayeea, SG., Badhekab, V.J. (2014) Effect of oxide-based fluxes on mechanical and metallurgical properties of Dissimilar Activating Flux Assisted-Tungsten Inert Gas Welds Journal of Manufacturing Processes Volume 16, Issue 1, Pages 137-143
Rahmatika, A., Ibrahim, S., Hersaputri, M., & Aprilia, E. (2019). Studi pengaruh variasi kuat arus terhadap sifat mekanik hasil pengelasan GTAW aluminium 1050 dengan filler ER 4043. Jurnal Polimesin, 17.
Sirin, K., Sirin, S.Y., Kaluc E. (2016) Influence of the interpass temperature on t8/5and the mechanical properties of submerged arc welded pipe, Journal of Materials Processing Technology, Vol 238: pp 152-159
Syukran, A. (2021). Effect of variation of TIG welding current on tensile strength and hardness of Aluminium A-6061, Journal Of Welding Technology, Volume 3, No. 1.
Theodore, J., Bertrand, E., Girault, B., Paillard, P.,et.al (2025) Investigation of the residual stresses and strains, microstructure and mechanical properties of stainless steel multipass welds produced using dual wire-tungsten inert gas process, Materialia, MTLA 40 102403
Vidyarthy R.S., Dwivedi, D.K. (2016). Activating flux tungsten inert gas welding for enhanced weld penetration, Journal of Manufacturing Processes, Volume 22, Pages 211-228
Xiong, J.H., Li S.K., Gao F.Y., Zhang J.X. 2015). Microstructure and mechanical properties of Ti6321 alloy welded joint by GTAW. Mater Sci Eng A, Vol 640, pp. 419-423
Wang, S., Luo, B., Bai Z. et.al. (2020). Revealing the aging time on the precipitation process and stress corrosion properties of 7N01 aluminium alloy, Vacuum 176 109311.
Wu, M., Luo, Z., Li, Y., Liu, L., Ao, S., (2022). Effect of heat source parameters on weld formation and defects of oscillating laser-TIG hybrid welding in horizontal position. J. Manuf. Proc. 83, 512–521.