|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques II
||Building Links between Laser Melting Phenomena Observed with In Situ X-ray Imaging and Laboratory-based Process Monitor
||Nicholas Calta, Aiden Martin, Jenny Wang, Jean Baptiste Forien, Maria Strantza, Manyalibo Matthews
|On-Site Speaker (Planned)
In situ X-ray probes have provided a wealth of information about process dynamics during laser powder bed fusion (LPBF) over the past few years. This has included studies of the melt pool fluid flow, defect formation, and post-solidification cooling behavior. These studies, while essential for a thorough understanding of the LPBF process, cannot be applied in a typical industrial setting because they require a synchrotron X-ray source. Away from a synchrotron, process monitoring approaches to detect defect formation or process stability typically use optical or acoustic approaches to infer melt pool behavior. In this talk I will outline our efforts to connect these two areas by comparing thermal emission to X-ray imaging data. I will describe experiments that measure the melt pool emission during synchrotron X-ray imaging experiments as well as comparisons between X-ray imaging and 3D part fabrication in the laboratory. Prepared by LLNL under Contract DE-AC52-07NA27344.