Wire+arc additive manufacturing (WAAM) system for Al-6.3Cu alloy using hybrid pulse variable polarity gas tungsten arc welding (HPVP-GTAW) process was established. The geometry of Al-6.3Cu single-pass multilayer deposits influenced by wire feed speed and travel speed

microstructure and tensile properties of deposited samples produced by the conventional VP-GTAW and HPVP-GTAW process were investigated. Experimental results show that the effective control on deposits geometry is obtained with the coordination of wire feed speed and travel speed. The internal structure of Al-6.3Cu deposits shows the typical layered distribution characteristics

mainly composed of equiaxed grains. WAAM samples with as-deposited condition have good plasticity

but the relatively low strength. Compared with conventional VPGTAW process

it is beneficial in enhancing the strength of Al-6.3Cu deposits using HPVP-GTAW process.