Document Type : Research Paper


1 Department of Mechanical Engineering, Nigeria Maritime University, Okerenkoko, Nigeria.

2 Department of Mechanical Engineering, Federal University of Petroleum Resources, Effurun, Nigeria.


The most desired strength value in any welding process is an excellent Ultimate Tensile Strength (UTS) of the weld in respect to the parent metal. Welding process parameters should be monitored and reviewed on a continuous basis due to the increased demand for structural and industrial materials with higher strength weld joints. The goal of this study is to look into the limitations of the investigated industrial firm's existing GMAW welding process parameters used in the welding procedure, and to propose alternative, uniquely designed, and improved process parameters to replace its existing procedure welding protocol, thereby improving weld results by achieving higher Ultimate tensile strength. The proposed process parameters were then compared to available literature, and optimization was performed using the Response Surface Method.

Tensile strength was determined on GMAW welding plates of 200mm by 20mm. The RSM Analysis was used to examine the data acquired from the experimental findings, and the results show that the current, voltage, and travel speed had the most significant effect on the ultimate weld strength. Furthermore, the findings show a high link between the actual and predicted ultimate tensile strength. Maximum ultimate tensile strengths of 425, 450, and 475Mpa were attained at welding voltages of 28 v, currents of 240 A, and travel speeds of 0.012 m/s .


  • Kishore, K., Krishna, P. G., Veladri, K., & Ali, S. Q. (2010). Analysis of defects in gas shielded arc welding of AISI1040 steel using Taguchi method. ARPN journal of engineering and applied sciences, 5(1), 37-41.
  • Achebo, J. I. (2011, July). Optimization of GMAW protocols and parameters for improving weld strength quality applying the Taguchi method. Proceedings of the world congress on engineering, 1, 6-8. London, U.K.
  • Shah, L. H., Akhtar, Z., & Ishak, M. (2013). Investigation of aluminum-stainless steel dissimilar weld quality using different filler metals. International Journal of automotive & mechanical engineering, 8. DOI: 15282/ijame.8.2013.3.0091
  • Onyekpe, B. (2002). The essentials of metallurgy and materials in engineering. AMBIK Press.
  • Abdulkhaleq, L. G. (2013). The inhibitive effect of eucalyptus camaldulenis leaves extract on the corrosion of low carbon steel in hydrochloric acid. Journal of engineering and sustainable development, 17(3), 169-185.
  • Afolabi, A. S. (2007). Corrosion and stress corrosion behaviors of low and medium carbon steels in agro-fluid media. Leonardo electronic journal of practices and technologies, 10, 55-66.
  • Ahmed, A. N., Noor, C. W., Allawi, M. F., & El-Shafie, A. (2018). RBF-NN-based model for prediction of weld bead geometry in Shielded Metal Arc Welding (SMAW). Neural computing and applications, 29(3), 889-899. DOI: 1007/s00521-016-2496-0
  • Edward B. (2011). Welding Principles and Practices, 4th Edition. McGraw-Hill Education (India) Pvt.
  • Qinglei, J., Yajiang, L. I., Juan, W., & Lei, Z. (2011). Characterization on strength and toughness of welded joint for Q550 steel. Bulletin of materia