|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||High Speed Imaging of Particle-melt Interactions in Laser Directed Energy Deposition (L-DED)
||James Haley, Joshua Yee, Nancy Yang, Julie M Schoenung, Enrique J Lavernia
|On-Site Speaker (Planned)
In the Laser Directed Energy Deposition process, final deposition geometry depends upon the shape of the molten pool of metal into which feedstock powder is sprayed. Observing flow and shape of the melt pool at low speeds as a statistically averaged system dependent on process parameters has been the subject of many studies, but few studies use high enough spatial or temporal sampling to trace individual particle trajectories and melt pool interaction events. In this work, deposition of stainless steel 316L is imaged at framerates of 10-500 kHz with pixel resolutions up to 3.6Ám to unveil process mechanisms. Observed events are compared with modelling results and the relevance towards enhancing macroscopic process reliability are discussed.
||Planned: Supplemental Proceedings volume