The Similar and Dissimilar TIG Welding of 316L and 321 Austenitic Stainless Steels

Being one the modern high quality industrial welding process especially for stainless steels and titanium alloys. TIG welding process has been has been researched for decades in order to define its parameters such as welding speed, current and arc length to improve the weld penetration. Hence it is a popular technique for joining thin materials - the thickness of the work piece is in general restricted to less than 6 mm-  in manufacturing industries. In this study, AISI 321 and 316L stainless steel sheets of 4 mm of thickness were used as welding metals. Thus, AISI 321 welding metal couples, AISI 316L welding metal couples and AISI 321 and 316L welding metal couples were selected to ensure a combination of similar and dissimilar metals. The filler metal rod was made of 316L SS. The specimens were cut in dimensions of 150 x 30 x 4 mm as using an abrasive cutter, then the V weld butt joint configuration with single groove of 37.5o ± 2.5o groove angle by a lathe machine. The welding current was 200 A and TIG welding process was performed manually in single under argon shielding gas atmosphere. After TIG welding process, the separate metallographic preparations, then microscopic and macroscopic examinations of the specimens, also hardness measurements of specimens were made. The rest of them was shaped for tensile strength measurement using Instron Universal Testing Machine. The hardness of the specimens were observed being altered in the range of 145-151 HRV(average) and their tensile strength values in the scale of 345-400 MPa (average).

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  • [1] 1. D. Ji, S. Lu, W. Dong, D. Li and Y. Li, “Study of the law between the weld pool shape variations with the welding parameters under two TIG processes”, Journal of Materials Processing Technology 212 (2012) 128-136.
  • [2] 2. Q. Li, X. Wang, Z. Zou, J. Wu, “Effect of activating flux on arc shape and arc voltage in tungsten inert gas welding”, Trans. Nonferrous Met. Soc. China 17 (2007) 486-490.
  • [3] 3. A. Kumar, P. Kumar, S. Mishra, R.K. Mishra, T. Srivastav, S. Mishra and R. Kumar, “Experimental Process of Tungsten Inert Gas Welding of A Stainless Steel Plate”, Materials Today: Proceedings 2 (2015) 3260-3267.
  • [4] 4. N. Moslemi, N. Redzuan, N. Ahmad, T. N. Hor, “Effect of Current on Characteristic for 316 Stainless Steel Welded Joint Including Microstructure and Mechanical Properties”, Procedia CIRP 26 (2015) 560-564.
  • [5] 5. V. A. Rao, R. Deivanathan, “Experimental Investigation for Welding Aspects of Stainless Steel 310 for the Process of TIG Welding”, Procedia Engineering 97 (2014) 902-908.
  • [6] 6. S.A.A. Akbari Mousavi, R. Miresmaeili, “Experimental and numerical analyses of residual stress distributions in TIG welding process for 304L stainless steel.5- S. Zuo, X. Zhou, G. Zhang, “Comprehensive welding technology for type 304 stainless steel rotating shaft”, Procedia Engineering 24 (2011) 840-844.[7] Topcu, İ., Güllüoğlu, A. N., Bilici, M. K., & Gülsoy, H. Ö. (2019). Investigation of wear behavior of Ti6Al-4V/CNT composites reinforced with carbon nanotubes. Journal of the Faculty of Engineering and Architecture of Gazi University, 34(3), 1441-1449.
  • [8] 7.http://www.aksteel.com/pdf/markets_products/stainless/austenitic/321_data_sheet.pdf
  • [9] Topcu, İ., Gülsoy, H. O., & Güllüoğlu, A. N. (2019). Evaluation of Multi-Walled CNT particulate reinforced Ti6Al4V alloy based composites creep behavior of materials under static loads. Gazi University Journal of Science, 32(1), 286-298.[10] 8. S. M. Darwish, A. Al Tamimi and S. Al-Habdan, “A Knowledge Base for Metal Welding Process Selection”, Int. J. Mach. Tools. Manufact. Vol. 37, No. 7, PP. 1007-1023.
  • [11] Topcu, İ , Karaman, E . (2019). Çok Duvarlı Karbon Nanotüp Takviyeli Düzenli/ Düzensiz Şekilli Ti-6Al-4V Kompozitlerin Aşınma Davranışlarının İncelenmesi. Düzce Üniversitesi Bilim ve Teknoloji Dergisi , 7 (3) , 1249-1260 . DOI: 10.29130/dubited.545434
  • [12] İ.Topcu,(2018),Investigation of Microstructure and Mechanical Properties of Metal Matrix (MMC) Composites Developed with CNT Reinforced Aluminum Matrix Materials,Academic Platform Journal of Engineering and Science6(3),164-167
  • [13] Topcu, İ , Çınar, Ö , Alyanakoğlu, A , Çetiner, B , Güllüoğlu, A . (2019). The Similar and Dissimilar Spot Welding of 304 and 316L Austenitic Stainless Steels. ALKÜ Fen Bilimleri Dergisi , 1 (2) , 55-59 . Retrieved from https://dergipark.org.tr/tr/pub/alku/issue/42573/468394