| Abstract Scope |
We develop a compliant, eddy current based solution to monitor in-situ the quality of metal parts manufactured by powder bed fusion. Our solution differs from usual monitoring approaches because it is sensitive to subsurface layers and flaws that will remain in the final part and not the surface features that are re-melted or to the melt pool properties that are unfortunately indirectly linked to the part quality. We present integration projects on commercial machines that have been instrumented with minimal interfaces using our autonomous, wireless detection unit. Data collected during fabrications with most of the materials used in LPBF will be discussed and the relationship with the porosity will be presented. The solutions can also be applied to inspect lattice like structures, whose in-situ and post build inspection remains a challenge. A remote NDT monitoring architecture, enabling third parties from the control and inspection industry to certify the parts remotely, is introduced. |