Procedure for Identifying the Thermal Reaction of Defects in Solidified Layers during the PBF-LB/M Process using Active Thermography

The geometrical complexity of additively manufactured parts and the comparatively high densities of the metallic materials used mean that non-destructive testing technologies reach their limits when it comes to post-process testing. In order to still be able to ensure the quality of parts the inspec...

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Bibliographic Details
Published in:Procedia CIRP 2023, Vol.118, p.670-675
Main Authors: Herzer, Fabian, Rau, Johannes, Seidel, Christian, Schilp, Johannes
Format: Article
Language:English
Subjects:
active thermography
defect categories
defects
lack of fusion
PBF-LB/M
process monitoring
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Summary:The geometrical complexity of additively manufactured parts and the comparatively high densities of the metallic materials used mean that non-destructive testing technologies reach their limits when it comes to post-process testing. In order to still be able to ensure the quality of parts the inspection must be implemented into the build-up process. A suitable technology for this is active thermography, as it can detect defects close to the surface and can use the laser of the manufacturing machine as an excitation source. In this paper, a procedure to identify the thermal reactions of defects in solidified layers and the results for the material 1.4404 are presented.
ISSN:2212-8271
2212-8271
DOI:10.1016/j.procir.2023.06.115