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Residual Stresses in a Wire and Arc-Directed Energy-Deposited Al–6Cu–Mn (ER2319) Alloy Determined by Energy-Dispersive High-Energy X-ray Diffraction
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Resumo(s)
In order to enable and promote the adoption of novel material processing technologies, a comprehensive understanding of the residual stresses present in structural components is required. The intrinsically high energy input and complex thermal cycle during arc-based additive manufacturing typically translate into non-negligible residual stresses. This study focuses on the quantitative evaluation of residual stresses in an Al–6Cu–Mn alloy fabricated by wire and arc-directed energy deposition. Thin, single-track aluminum specimens that differ in their respective height are investigated by means of energy-dispersive high-energy X-ray diffraction. The aim is to assess the build-up of stresses upon consecutive layer deposition. Stresses are evaluated along the specimen build direction as well as with respect to the lateral position within the component. The residual stress evolution suggests that the most critical region of the specimen is close to the substrate, where high tensile stresses close to the material’s yield strength prevail. The presence of these stresses is due to the most pronounced thermal gradients and mechanical constraints in this region.
Descrição
This research was funded within the AIT’s strategic research portfolios 2022 and 2023. We acknowledge DESY (Hamburg, Germany), a member of the Helmholtz Association HGF, for the provision of experimental facilities. Parts of this research were carried out at PETRA III at beamline P61A, operated by Helmholtz-Zentrum Hereon. Beamtime was allocated for proposal I-20211078 EC. JPO acknowledges funding by national funds from FCT - Nanostructures, Nanomodelling, and Nanofabrication – i3N. Technical assistance and expert advice by S. Degener, M. Schnall, A. Birgmann, and S. Hovden are greatly appreciated.
Open access funding provided by AIT Austrian Institute of Technology GmbH.
Publisher Copyright:
© 2024, The Author(s).
Palavras-chave
Condensed Matter Physics Mechanics of Materials Metals and Alloys