|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location Specific, Processing-Microstructure-Property-Relationships III
||In Operando High-speed X-ray Imaging of Inconel 625 during Laser Powder Bed Fusion Additive Manufacturing
||Enyu Guo, Chu Lun Alex Leung, Robert C Atwood, Peter D Lee
|On-Site Speaker (Planned)
Understanding the laser-powder interactions during additive manufacturing is critical for determining the process-structure-property-performance relationships. We use in operando high-speed synchrotron X-ray imaging to directly monitor the dynamic behaviour inside the molten pools and melt tracks, enabling the direct capture of rapid solidification and defect formation. We study the laser powder bed fusion (LPBF) of Inconel 625 powder on substrate and powder (overhang condition). Both steady-state and non-steady state behaviour of the metal LPBF process were investigated, including the formation and growth mechanisms of the molten pool and defects (e.g. spattering and porosity). The experimental results help understand and predict complex behaviour and dynamic changes of the melt features during LPBF, providing crucial information to validate simulation tools and predict location specific microstructures and hence properties.
||Planned: Supplemental Proceedings volume