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Advisor(s)
Abstract(s)
This paper is focused on the formability of wire-arc additively manufactured AISI 316L stainless steel sheets with the purpose of analysing the feasibility of including this material in hybrid additive manufacturing chains involving sheet metal forming operations. Conventional tensile tests performed in specimens obtained from different orientations to the building direction were carried out to characterise the mechanical properties, the strain loading paths and the limiting strains at fracture. Microstructure observations combined with fractography analysis add insight to the results by establishing a link between the forming limits by fracture and the crack opening mechanisms. Results obtained for wrought commercial AISI 316L stainless steel sheets are included for comparison purposes and reveal that the additively manufactured sheets have a much stronger anisotropic behaviour and poorer formability due to their dendritic-based microstructure. Still, the forming limits obtained from the experiments allow concluding that the additively manufactured sheets can withstand large plastic deformations and, therefore, can be used in hybrid additive manufacturing routes.
Description
Keywords
Hybrid additive manufacturing Wire-arc additive manufacturing Fracture forming limit Fractography Sheet metal forming
Citation
Pragana JP, Bragança IM, Reis L, Silva CM, Martins PA. Formability of wire-arc deposited AISI 316L sheets for hybrid additive manufacturing applications. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. 2021;235(12):2839-2850. doi:10.1177/14644207211037033
Publisher
SAGE