Investigation of the Difference in the Pulse Current in the Double Pulsed Gas Metal Arc Welding of Aluminum Alloys

Abstract

In this paper, a double pulse gas metal arc welding (DP-GMAW) for an AA6061-T6 aluminum alloy based on fewer basic welding parameters than the traditional DP-GMAW is proposed. This study compared the difference in pulse base currents (ΔIb) and the difference in the pulse peak currents (ΔIp) by analyzing the electrical signal and morphology properties of welded samples. The results indicated that changing ΔIp caused welding defects or even welding failure easily. The welding stability after changing ΔIb was much better than that after changing ΔIp. The individual fish-scale width of the weld joint remained unchanged when ΔIb was at different values. In addition, the average absorbed work, tensile strength, yield strength and elongation of the weld joints obtained by different ΔIb values reached 31.1%, 60.2%, 52.9% and 37.9% of the base metal, respectively.

Studies on Quality of Joints and Phenomena Therein for Welded Vehicle Components Made of Aluminium Alloy – a Review

“…Jin et al [419] compared the difference in pulse base currents (ΔIb) and the difference in the pulse peak currents (ΔIp) for welded joints of 6061-T6 alloys obtained using the double pulse gas metal arc welding DPGMAW. They found that changing ΔIp caused welding defects or even welding failure.…”

Studies on the Quality of Joints and Phenomena Therein for Welded Automotive Components Made of Aluminum Alloy—A Review

“…Jin et al [556] compared the difference in pulse base currents (∆Ib) and the difference in pulse peak currents (∆Ip) for the welded joints of 6061-T6 alloys obtained using the double-pulse gas metal arc welding (DPGMAW). They found that changing ∆Ip caused welding defects or even welding failure.…”