| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Comparison of DED Nozzles’ Performance via In Situ Synchrotron Radiography |
| Author(s) |
Imogen Cowley, Harry E. Chapman, Sebastian Marussi, Kai Zhang, Robert Atwood, Martyn A. Jones, Chu Lun Alex Leung, Peter D. Lee |
| On-Site Speaker (Planned) |
Harry E. Chapman |
| Abstract Scope |
Directed energy deposition (DED) is a metal additive manufacturing process that has many process variables, with complex interdependencies. Because of this variability, comparing and repeating experimental results performed on different DED systems is an ongoing challenge; one frequently approached by defining normalized parameters, such as ‘linear energy density’. However, these often neglect or oversimplify the role of powder delivery, despite the influence of nozzle characteristics upon process performance being well documented. This is especially true of work concerning in situ synchrotron studies, which seeks to be representative of commercial DED. In this study, two nozzles are directly compared in a DED system that is otherwise the same. First, the powder streams are characterized using high-speed optical imaging. Differences in the deposition process (including powder catchment, track characteristics, and melt pool shape) are then revealed using in situ synchrotron radiography (DLS-I12, beamtimes MG30735&MG34549), infrared imaging, and ex situ sample analysis. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Process Technology, Powder Materials |