Abstract
In this work, Cu-6.5% Al alloy was deposited by wire arc additive manufacturing based on cold metal transfer (CMT) welding process, through separate feeding of pure Cu and Al wires into a molten pool, onto a 3-mm pure copper plate. The deposited alloy was homogenized by heat treatment at 800 °C (2 h) and evaluated for their microstructure using optical microscopy, scanning electron microscopy and transmission electron microscopy, and mechanical properties. The paper discusses the structure-mechanical property correlation under both as-fabricated and heat-treated condition. Results reveal that (1) the CMT welding process is efficient in making Cu-Al alloy with target chemical composition, (2) heat treatment improved solid solution strengthening effect, which improved the hardness, and (3) heat treatment improved tensile strength properties and ductility of the alloy.
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This work was sponsored by the National Natural Science Foundation of China under the Grant No. 51975419 and Foreign Experts Bureau Project of China under Grant Nos. QN20200116001 and G20200116018.
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Wang, Y., Su, C. & Konovalov, S. Microstructure and Mechanical Properties of Cu-6.5%Al Alloy Deposited by Wire Arc Additive Manufacturing. Metallogr. Microstruct. Anal. 10, 634–641 (2021). https://doi.org/10.1007/s13632-021-00781-3
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DOI: https://doi.org/10.1007/s13632-021-00781-3