Review Article
Open Access
Effect of GMAW process parameters on the influence of bead geometry and HAZ area on ASTM A516 grade 70 Low alloy Pressure vessel steel
Anbarasan N*, Oyyaravelu R, Kuppan P
Center for Advanced Materials Processing and Testing (CAMPT),
VIT University, Vellore, Tamil Nadu, India
Anbarasan N et al /Int.J. TechnoChem Res. 2015,1(1),pp 01-10.
Abstract
ASTM A516 grade 70 low alloy steels is a pressure vessel grade steels .The present
research investigates the effect of GMAW (Gas Metal Arc Welding) process parameters on the bead
geometry and HAZ area on 6mm thick plate through bead on plate experiments. The GMAW process
parameters such as voltage, welding speed, wire feed rate and their effect are studied. The Taguchi L9
orthogonal array design is applied for this approach. In this design the three factors with three levels
voltage (17, 18,19V), welding speed (600,800,1000mm/min), wire feed rate (50, 60,70mm/s) are used
for investigation. ANOVA (Analysis of variance) was used in this study to find the most significant
parameters. The results from Taguchi analysis indicated that the parameters under consideration have
an influence in the bead geometry and HAZ area. ANOVA result showed that the parameter wire feed
rate was the most significant parameter which influence bead height and depth of penetration .The
Bead Width is dominated by the voltage influence and wire feed rate being the most influential
parameter on HAZ area.
Keywords
GMAW (Gas Metal Arc Welding); ASTM A516; Taguchi; Bead geometry; HAZ area.
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