Qi, ZewuQi, BojinCong, BaoqiangSun, HongyeZhao, GangDing, Jialuo2020-01-282020-01-282019-03-09Qi Z, Qi B, Cong B, et al., (2019) Microstructure and mechanical properties of wire + arc additively manufactured 2024 aluminum alloy components: As-deposited and post heat-treated. Journal of Manufacturing Processes, Volume 40, April 2019, pp. 27-361526-6125https://doi.org/10.1016/j.jmapro.2019.03.003https://dspace.lib.cranfield.ac.uk/handle/1826/15028Restricted by the type of commercial aluminum wire, 2024 aluminum alloy cannot be built through conventional single wire + arc additive manufacturing technology. By simultaneously feeding two wires (ER2319 and ER5087) and adjusting the wire feed speed, 2024 aluminum alloy deposits can be achieved with double - wire + arc additive manufacturing process. Heat treatment procedures (solution + natural/artificial aging) were conducted for further improving the properties. The microstructure and mechanical properties of as-deposited and heat-treated 2024 aluminum alloy deposits were tested and analyzed. The microstructure differed in different conditions. Obvious dendrite morphology in as-deposited condition disappeared after heat treatment, and the phases turned to be α-Al + Al2Cu from α-Al + Al2Cu + Al2CuMg. After heat treatment, layer distributing characteristics of the phases became obvious. Post-deposition heat treatment can improve the micro hardness, strength and horizontal elongation of WAAM 2024 aluminum alloy deposits. The elongation along vertical direction decreased.enAttribution-NonCommercial-NoDerivatives 4.0 InternationalMicrostructureWire + arc additive manufacturingHeat treatmentMechanical property2024 Aluminum alloyAs-depositedArticle