Abstract
This study investigated the effect of heat treatment on the microstructure and corrosion behavior of the Wire Arc Additive Manufacturing (WAAM) 2319 Al alloy. The results showed that the solid solution treatment and the artificial ageing significantly increased the microhardness of the alloy, and the second phase of the alloy changed from a continuous to a dispersed distribution. Heat treatment led to an increase in pores, and the number of small-size pores increased significantly with the ageing time; this increased the risk of crevice corrosion. The as-deposited WAAM 2319 Al alloy, characterized by an α-Al matrix and coarse intergranular intermetallics Al2Cu, underwent galvanic corrosion, which severely damaged the passivation film. The solid solution treatment alleviated this by dissolving the coarse intergranular intermetallics and improving corrosion resistance. During artificial ageing, the corrosion potential decreased gradually as the size and number of precipitated phases increased. Pitting corrosion was the most severe, and corrosion resistance was lowest in the solid solution + peak ageing state.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
