Observation of in-situ tensile wire-arc additively manufactured 205A aluminum part: 3D pore characteristics and microstructural evolution.

Highlights • 205A aluminum part fabricated using robotic CMT technology. • In-situ 3D tensile propertied characterization using X-ray microscopy. • Periodic refined α-Al grains with dispersed dot-like Al 2 Cu within AM part. • Homogenous spherical pores with a relatively high porosity within AM part. • Enhanced tensile strength, while a slightly deteriorated plasticity for AM part. Abstract 205A aluminum thin-wall part was additively manufactured using cold metal transfer (CMT) equipment. The influence of α-Al grains, Al 2 Cu 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 Al 2 Cu phase. A slightly deteriorated plasticity was observed, which was mainly related to micro-scaled spherical pores with a relatively high porosity of 3.51%. [ABSTRACT FROM AUTHOR]