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ElectroMagnetic LAYER-wise testING for powder bed fusion metal additive manufacturing

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Experiments with Near-Field Microwave Imaging for Powder Bed Fusion Metal Additive Manufacturing
Publication . Barancos, André; Macedo, Victor; Batalha, Rodolfo L.; Machado, Miguel A.; Santos, Telmo G.; Rosado, Luís S.; DEMI - Departamento de Engenharia Mecânica e Industrial; UNIDEMI - Unidade de Investigação e Desenvolvimento em Engenharia Mecânica e Industrial
Experiments to evaluate the use of Near-Field Microwave (NFMW) imaging for the Powder Bed Fusion quality control are here reported. A NFMW sensor was employed together with general purpose instrumentation to perform measurements over a stainless steel 316 sample produced by laser PBF. Although with limited sensitivity, results showed that NFMW sensors can be used to evaluate the proper layer consolidation while relying on the electrical conductivity difference between powder and consolidated metal. Results also highlight the sensor high spatial resolution, well appreciated for PBF layer-wise imaging.
2023-08-01Documento de conferência Acesso aberto Ver mais
Evaluating Capacitive Imaging for Powder Bed Fusion Metal Additive Manufacturing
Publication . Macedo, Victor; Barancos, André; Machado, Miguel A.; Santos, Telmo G.; Rosado, Luís S.; DEMI - Departamento de Engenharia Mecânica e Industrial; UNIDEMI - Unidade de Investigação e Desenvolvimento em Engenharia Mecânica e Industrial
This work evaluates the use of co-planar capacitive sensors to provide layer-wise imaging results for the Powder Bed Fusion quality control. A new sensor was designed together with a digital readout electronics which allowed for high-resolution localized measurements. The system was evaluated in different surface features produced by laser PBF with stainless steel 316 powder. Features were tested with and without the presence of the original powder with results showing that the powder presence masked the output for most of the features. This suggests that the ability of carrying charges within an alternating electrical field is similar between powder and the consolidated metal, and that, the concerning signal contribution is much higher than that caused by the conductivity difference between powder and consolidated metal.
2023-08-01Documento de conferência Acesso aberto Ver mais

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Fundação para a Ciência e a Tecnologia

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Concurso de Projetos de Investigação de Caráter Exploratório (PeX) em Todos os Domínios Científicos

Número da atribuição

EXPL/EEI-EEE/0394/2021

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