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 () and the difference in the pulse peak currents () by analyzing the electrical signal and morphology properties of welded samples. The results indicated that changing caused welding defects or even welding failure easily. The welding stability after changing was much better than that after changing . The individual fish-scale width of the weld joint remained unchanged when was at different values. In addition, the average absorbed work, tensile strength, yield strength and elongation of the weld joints obtained by different values reached 31.1%, 60.2%, 52.9% and 37.9% of the base metal, respectively.
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