Hybrid Laser-Arc Welding of AA6061-T6 Butt Joints

Priti Wanjara; Xin Jin Cao

doi:10.4028/www.scientific.net/MSF.783-786.2833

Paper Titles

Effect of Strain Rate on Tensile Properties of Miniature Size Specimens of Several Lead-Free Alloys
p.2810

A Study on the Effect of the Interpass Temperatures in Properties and Microstructures of the Alloy 625 Dissimilar Fusion Zone
p.2816

Evaluation of the Corrosion Resistant Weld Cladding Deposited by the TIG Cold Wire Feed Process
p.2822

Plasma Diagnostics of Arc during MIG Welding of Aluminum
p.2828

Hybrid Laser-Arc Welding of AA6061-T6 Butt Joints
p.2833

Process Window for Friction Stir Lap Welding of Aluminum Alloy 6061
p.2839

Optimisation of Diffusion Bonding Parameters of Ti Alloys through the Structure and Surface Conditions
p.2845

Hardness Prediction for Temper Bead Welding of Non-Consistent Layer Technique
p.2851

Thermal Recovery of Plastic Deformation in Dissimilar Metal Weld
p.2857

HomeMaterials Science ForumMaterials Science Forum Vols. 783-786Hybrid Laser-Arc Welding of AA6061-T6 Butt Joints

Hybrid Laser-Arc Welding of AA6061-T6 Butt Joints

Abstract:

Hybrid laser-arc welding (HLAW) of butt joints in 3.18 mm thick aluminum alloy (AA) 6061-T6 sheets was investigated in the present study. Under optimized process conditions, high integrity welds with approximately 2% shrinkage and gas porosity were obtained. The weld bead geometry was determined to conform to the crown and root reinforcement specifications for welded aluminum construction - CSA W 59.2 M1191. Softening in the heat-affected zone (HAZ) and fusion zone (FZ) of the welds was observed, the former due to grain coarsening and the latter due to the dissolution of the hardening precipitates as well as the dilution from the application of the ER 5356 filler wire. Under optimized process conditions, the gap tolerance was determined to be 0.5 mm, beyond which the performance of the joints during bend testing was compromised.