Mechanical characterization of a stainless steel overlapped assembly welded by MAG process

Abstract

MIG/MAG welding is an assembly process very commonly used in different industries. It has the advantage of being faster, especially on thicker materials, economical and suitable for welding steels. Stainless steels are very well suited for metal assembly applications with an attractive compromise between strength and density, reasonable manufacturing cost and good MIG/MAG weldability. In this paper, the present work is oriented the use of the MAG welding process for the mechanical characterization of a welded lap joint for an assembly of 304 L stainless steel sheets. The tensile shear tests show that the load / displacement curves (i.e. mechanical characteristics) are affected by the variation in currents of welding. The tensile strength increases with increasing in current of welding. The fracture strength is reduced from 200 A of the current of welding. Morphology of fracture shows that the fracture is made along the weld bead (in Fusion zone).

Keywords

• MIG/MAG Welding process
• Stainless steel
• mechanical characterization

References

1. [1] F.Valensi, N.Pellerin, S.Pellerin, K.Musiol, Ch. de Izarra, S. Zielińska, F.Briand (2006). "Experimental study of a MIG-MAG welding arc".
2. [2] S.A. Solodskiy, Yu N Saraev, A G Malchik, S E Korotkov (2016). Technology Of MIG-MAG Welds Strength Enhancement. VII International Scientific Practical Conference "Innovative Technologies in Engineering" IOP Publishing IOP Conf. Series: Materials Science and Engineering 142 (2016) doi:10.1088/1757-899X/142/1/012016
3. [3] Guidelines to Gas Metal Arc Welding (GMAW), USA, 2007−02 www.millerwelds.com/pdf/mig_handbook.pdf. Retrieved on 24th Jan, 2007.
4. [4] N. Akkaş, E. İlhan , F. Varol, S. Aslanlar (2015). Welding Time Effect on Mechanical Properties in Resistance Spot Welding of S235JR(Cu) Steel Sheets Used in Railway Vehicles. ACTA PHYSICA POLONICA A, Vol. 129(4), pp 541-543.
5. [5] M. Pouranvari (2011). Effect of Welding Parameters on the Peak Load and Energy Absorption of Low-Carbon Steel Resistance Spot Welds", International Scholarly Research Notices, vol. 2011, 7 pages, 2011. https://doi.org/10.5402/2011/824149.
6. [6] Bouyousfi, B., Sahraoui, T., Guessasma, S., Tahar Chaouch, K. (2007). Effect of process parameters on the physical characteristics of spot weld joints. Materials and Design, 28, pp 414-419.
7. [7] Lopez, V., Reyes, A., Zambrano, P., & Del Prado, J. (2012). Effect of welding on the fatigue strength of welded joints using the GMAW process in transformation induced plasticity steels (TRIP) used in the automotive industry. MRS Proceedings, 1381, IMRC 11-1381-S22-008. doi:10.1557/opl.2012.384
8. [8] Yustiasih Purwaningrum, Medilla Kusriyanto, Rudi Kurniawan, Okto Akbar Rizky (2018). Effect of DE-GMAW (Double Electroda Gas Metal Arc Welding)’s Resistance on Mechanical and Physical Properties of Aluminium Alloy Weld. Key Engineering Materials, Vol. 789, pp 64-68.

9. [9] J.I. Achebo (2011). Optimization of GMAW protocols and parameters for improving weld strength quality applying the Taguchi method. In: Proceedings of the world congress on engineering, pp 6-8.
10. [10] I.M.W. Ekaputra, Sudi Mungkasi, Gunawan Dwi Haryadi, Rando Tungga Dewa, Seon-Jin Kim. (2018). The influence of welding speed conditions of GMAW on mechanical properties of 316L austenitic stainless steel. MATEC Web of Conferences 159, 02009 (2018), pp 1-6.
11. [11] Bachir Mezrag, Frédéric Deschaux-Beaume, Mustapha Benachour (2015). Control of mass and heat transfer for steel/aluminium joining using Cold Metal Transfer process. Science and Technology of Welding and Joining, Maney Publishing, 2015, 20 (3), pp.189-198.