Abstract
205A aluminum thin-wall part was additively manufactured using cold metal transfer (CMT) equipment. The influence of α-Al grains, Al2Cu phase, and pore characteristics on the in-situ tensile behavior was investigated. The experimental results show an enhancement in the ultimate tensile strength (UTS) in the as-deposited sample, as compared to its as-cast counterpart. This can be largely attributed to the presence of the refined α-Al grains more than dot-like Al2Cu phase. A slightly deteriorated plasticity was observed, which was mainly related to micro-scaled spherical pores with a relatively high porosity of 3.51%.
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