Microstructure, defects, and mechanical properties of wire + arc additively manufactured AlCu4.3-Mg1.5 alloy

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dc.contributor.authorGu, Jianglong
dc.contributor.authorGao, Minjie
dc.contributor.authorYang, Shouliang
dc.contributor.authorBai, Jing
dc.contributor.authorZhai, Yuchun
dc.contributor.authorDing, Jialuo
dc.date.accessioned2020-02-03T16:05:20Z
dc.date.available2020-02-03T16:05:20Z
dc.date.issued2019-11-13
dc.description.abstractThe wire with a composition of AlCu4.3%Mg1.5% was customized and used to deposit the WAAM alloy with the power source of cold metal transfer. The microstructure, defect, and mechanical properties of the as-deposited and heat-treated WAAM alloys were studied. Key findings demonstrated that the microstructure of the as-deposited alloy was characterized by a hierarchical distribution of dendrites, equiaxed grains, and a slight number of columnar grains. The volume fraction of the network-like scattered coarse particles of second phases θ + S reduced by 95% after the T6 heat treatment. With an average microhardness of 161.4 HV, the mean yield strength and ultimate tensile strength of the WAAM alloy increased by 116% and 66% achieving 399 MPa and 485 MPa in the horizontal direction after heat treatment. The precipitation of a high density of needle-shaped metastable S′ precipitates was responsible for the significantly enhanced mechanical properties. However, this WAAM alloy has exhibited an anisotropic tensile property. A considerable number of sharp-angled defects like linear and chain-like micropores, which generally depress the mechanical properties, were formed in the WAAM alloys.en_UK
dc.identifier.citationGu J, Gao M, Yang S, et al., (2020) Microstructure, defects, and mechanical properties of wire + arc additively manufactured AlCu4.3-Mg1.5 alloy. Materials and Design, Volume 186, January 2020, Article number 108357en_UK
dc.identifier.issn0264-1275
dc.identifier.urihttps://doi.org/10.1016/j.matdes.2019.108357
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/15080
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectWire + arc additive manufacturingen_UK
dc.subjectAl alloyen_UK
dc.subjectAl-Cu-Mgen_UK
dc.subjectMicrostructureen_UK
dc.subjectDefecten_UK
dc.subjectMechanical propertyen_UK
dc.titleMicrostructure, defects, and mechanical properties of wire + arc additively manufactured AlCu4.3-Mg1.5 alloyen_UK
dc.typeArticleen_UK

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