|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||2023 Technical Division Student Poster Contest
||SPU-5: A High-speed Radiography Study for Validating the Effect of Dwell Time on Melt-pool Dynamics during Laser Powder Bed Fusion
||Raymond Wysmierski, Rakesh Kamath, Gerry Knapp, John Coleman, Stuart Slattery, Sam Reeve, Hahn Choo
|On-Site Speaker (Planned)
Understanding the relationship between processing parameters and microstructure is key to advancing metal additive manufacturing processes. High speed synchrotron x-ray radiography was conducted at the Advanced Photon Source (Argonne National Laboratory) in tandem with the laser spot melting of Ti-6Al-4V to gain a basic understanding of the melt pool dynamics during a laser powder bed fusion process. The dwell time of the laser spot melt was varied from 2 ms to 8 ms, maintaining a constant laser power of 82 W, to observe its effect on the evolution of melt pool dimensions and the solid-liquid interface velocity. Melt pool boundaries were tracked using the resulting x-ray radiography images. Moreover, the in-situ radiography data was used to validate and improve a physics-based melt pool model based on the OpenFOAM framework. This effort will help further understanding of microstructure evolution and benefit industry by optimizing laser AM processes of the Ti-6Al-4V alloy.
||Additive Manufacturing, Modeling and Simulation, Titanium