Application of Active IR Thermography in Defect detection of FDM printed parts with different infill percentage

With the increasing development of additive manufacturing processes and the production of more precise products using different materials, parts made from these processes are increasingly being used as end products. In this paper Fused Deposition Modeling (FDM) printed parts are studied and tested by Active IR Thermography method. to this regard, Three PLA samples are printed with different infill rates. The filament burnout defect was produced during the printing process. The excitation performed by means of two halogen lamps, directly radiated to the samples. Two different set-ups including transmission and reflection modes are selected. The Thermal images are captured during heating as well as cooling time and all the defects are revealed in the thermal images. Results indicated that the proposed Active IR Thermography, is capable in detection of filament burnout defect in this parts. Moreover, it has been indicated that the reflection method leads to better outcomes in comparison with the transmission mode.