Effect of arc mode in cold metal transfer process on porosity of additively manufactured Al-6.3%Cu alloy

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Cold metal transfer (CMT) technology - An overview (2017, unknown): “The key factors which enabled this are low heat input, a ﬁ ne equiaxed grain structure and effective oxide cleaning of the wire [68].”
Control of residual stress and distortion in aluminium wire + arc additive manufacture with rolling (2018, background): “The as-deposited 2319 material, which contains large precipitates and pores, has a yield strength of 125 MPa, which can be increased to over 300 MPa with a T6treatment [39], [40].”
Microstructure and mechanical properties of wire + arc additively manufactured 2024 aluminum alloy components: As-deposited and post heat-treated (2019, methodology): “[7], the porosity of WAAM aluminum alloys can be prominently affected by the arc mode in cold metal transfer (CMT) process, and CMT pulse advanced arc mode was proved to be the most applicable process for effectively controlling the porosity.”
Wire and arc additive manufacturing: a comparison between CMT and TopTIG processes applied to stainless steel (2018, background): “These works have been mainly focused on titanium [3–7], aluminum [8, 9], This article is part of the collectionWelding, AdditiveManufacturing, and Associated NDT”