Journal of Welding and Joining

9: J Weld Join. 2014;32(1):28-33. Published online February 27, 2014.
DOI: https://doi.org/10.5781/JWJ.2014.32.1.28; Weldability Evaluation in Plasma-GMA Hybrid Welding for Al-5083 Using Analysis of Variance; Jin Soo Jung^*, Jong Jung Lee^*, Hee Keun Lee^**, Young Whan Park^*; Corresponding author: Young Whan Park ,Email: parkyw@pknu.ac.kr

Abstract: In this paper, I-butt welding with 6mm thickness using Plasma-GMA welding was carried out. And weld characteristics of the Al-5083 aluminium alloy for Plasma-GMA hybrid welding was evaluated. The orthogonal experimental design was used to investigate the influence of plasma-MIG welding parameters such as plasma current, wire feeding rate, MIG-welding voltage and welding speed on the weld bead geometry and tensile strength using the ANOVA(Analysis of Variation). Then we conducted evaluation of contribution for process parameters. ANOVA results show that bead dimensions are affected by wire feeding speed, welding voltage and welding speed and tensile strength is mainly affected by welding speed and plasma arc current. Tensile strength was decreased by rise in plasma welding current because GMA welding current was decreased by plasma arc.

Keywords :AL5083 alloy, Plasma-GMA welding, ANOVA, Hybrid welding, Orthogonal design