In situ monitoring of selective laser melting of zinc powder via infrared imaging of the process plume

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In-Situ Defect Detection in Laser Powder Bed Fusion by Using Thermography and Optical Tomography—Comparison to Computed Tomography (2020, background): “Therefore, several different in-situ monitoring approaches have been developed to observe distinct process parameters and objects such as laser power [17,18], powder recoating and powder bed surface [19], powder bed compaction [20], plume and spatter behavior [21,22], particle gas emissions [23] or ”
X-Ray Microcomputed Tomography in Additive Manufacturing: A Review of the Current Technology and Applications (2018, unknown): “20 Many of the defects can be attributed to nonoptimal build conditions and powder properties.”
A review on wire arc additive manufacturing: Monitoring, control and a framework of automated system (2020, background): “[64] developed an in situ monitoring system for SLM process based on capturing infrared images of the process plume.”