IN-SITU DEFECT DETECTION FOR LASER POWDER BED FUSION WITH ACTIVE LASER THERMOGRAPHY

dc.creatorBreese, P.P.
dc.creatorBecker, T.
dc.creatorOster, S.
dc.creatorMetz, C.
dc.creatorAltenburg, S.J.
dc.date.accessioned2024-03-27T15:45:53Z
dc.date.available2024-03-27T15:45:53Z
dc.date.issued2023
dc.description.abstractDefects are still common in metal components built with Additive Manufacturing (AM). Process monitoring methods for laser powder bed fusion (PBF-LB/M) are used in industry, but relationships between monitoring data and defect formation are not fully understood yet. Additionally, defects and deformations may develop with a time delay to the laser energy input. Thus, currently, the component quality is only determinable after the finished process. Here, active laser thermography, a nondestructive testing method, is adapted to PBF-LB/M, using the defocused process laser as heat source. The testing can be performed layer by layer throughout the manufacturing process. We study our proposed testing method along experiments carried out on a custom research PBF-LB/M machine using infrared (IR) cameras. Our work enables a shift from post-process testing of components towards in-situ testing during the AM process. The actual component quality is evaluated in the process chamber and defects can be detected between layers.
dc.description.departmentMechanical Engineering
dc.identifier.urihttps://hdl.handle.net/2152/124488
dc.identifier.urihttps://doi.org/10.26153/tsw/51096
dc.language.isoen
dc.publisherUniversity of Texas at Austin
dc.relation.ispartof2023 International Solid Freeform Fabrication Symposium
dc.rights.restrictionOpen
dc.subjectlaser thermography
dc.subjectdefect detection
dc.subjectlaser powder bed fusion
dc.subjectin-situ
dc.subjectadditive manufacturing
dc.titleIN-SITU DEFECT DETECTION FOR LASER POWDER BED FUSION WITH ACTIVE LASER THERMOGRAPHY
dc.typeConference paper

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