About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Self-organizing Nano-architectured Materials
|
Presentation Title |
Characterization of Particle Impact and Pore Formation in Directed Energy Deposition via In-situ, Highspeed Imaging and Micro X-ray Computed Tomography |
Author(s) |
Samantha Webster, Jian Cao, Newell H. Moser, Edward Garboczi, Sarah Wolff, Kamel Fezzaa, Tao Sun |
On-Site Speaker (Planned) |
Samantha Webster |
Abstract Scope |
Process defects currently limit the use of additive manufacturing (AM) components in industry due to shorter fatigue life, potential for catastrophic failure, and lower strength. Conditions under which these defects form, and their mechanisms, are starting to be characterized through in-situ, high-speed X-ray imaging of both laser powder bed fusion (LPBF) and directed energy deposition (DED). However, it is evident that particle impact in powder blown DED will illicit very different behavior due to stochastic, violent powder delivery. In this study, highspeed X-ray imaging at the Advanced Photon Source (APS) was utilized in conjunction with a high through-put DED set-up to observe particle impact behavior and types of pore formation in both single track and multi-layer builds. An analytical model adapted from hydrophobic solid particle entrance into a liquid is presented and connected to pore characterization via micro X-ray Computed Tomography (CT) conducted at the National Institute of Standards and Technology. |
Proceedings Inclusion? |
Undecided |
Keywords |
Additive Manufacturing, Characterization, Other |