Influence of Tack Weld on Physical and Mechanical Properties of MIG Welding of AA5083H116

• Published in: IOP conference series. Materials Science and Engineering 2019-08, Vol.547 (1), p.12016
• Main Authors: Mudjijana, Ilman, M.N., Iswanto, P.T.
• Format: Article
• Language: English
• Subjects: AA5083H116; Argon; Bend strength; Bowing; Diameters; Distortion; ER5356; Gas metal arc welding; Mechanical properties; Physical properties; T-MIG welding; tacked weld; Welding machines
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/547/1/012016

The research objective is to determine the effect of tack weld on physical and mechanical properties of tandem-MIG (T-MIG) welding of AA5083H116 materials. A Tenjima 200S MIG machine, sample dimension of 300mm × 75mm × 3mm, and 0.8mm diameter ER5356 electrode were used. The distance between electrodes of T-MIG was varied of 18, 27, 36mm. Welding speed of 12.5mm/s, and welding process was shield using argon gas. First, T-MIG welding were employed for untacked and tacked welding. The leading current was 125A and trailing current was 120A, but current wave of each T-MIG welding machine was not taken into account. The welding voltage was set the same. Second, parameters resulting in better physical and mechanical properties were then employed for single-MIG (S-MIG) tack weld using 8, 10, 12mm/s welding speeds. The result shows that T-MIG tacked weld produced in bowing distortion and T-MIG untack weld in downward bending distortion. Higher peak temperature resulted in larger distortion. T-MIG tacked weld results in welding efficiency 76% being similar with that of bending strength (75%) in comparison with that of as received material. T-MIG tack weld results in better penetration and 37% shorter welding time in comparison with S-MIG tack weld.