Wire and Arc Additive manufacturing (WAAM) is one of the most advanced technologies that uses the principle of winding the additive material layer by layer. The characteristic advantage of this technique is that large and massive products can be produced at low cost and with short production times. Due to the novelty of the technology (it is already slowly gaining ground in industry, especially in aeronautics), we decided to investigate the characteristics of aluminium winding. Aluminium and its alloys are widely used because of their low mass and density, good corrosion resistance, thermal and electrical conductivity, relatively good strength and ductility. Due to aluminium's difficulty in welding, we have welded using the CMT+PULSE (Cold Metal Transfer) programme and have attempted to weld thin and wide walls. After the process, we tested them in three different tests; tensile, toughness and bending, and we also checked the microstructure. We found that the incidence of porosity was up to 60% higher in the wide walls (6 to 1 ratio in the amount of bubbles). The vertical orientation of the specimen was found to have a 10° higher bending capacity than the horizontal orientation (35° vs. 25° on average). In the other tests, there were no significant differences in the orientation of the specimens.
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