About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques
|
Presentation Title |
In-situ and Operando X-ray Imaging of the Laser Blown Powder Directed Energy Deposition Process |
Author(s) |
Yunhui Chen, Samuel Clark, Lorna Sinclair, Chu Lun Alex Leung, Sebastian Marussi, Robert C. Atwood, Martyn A. Jones, Gavin J. Baxter, Peter D. Lee |
On-Site Speaker (Planned) |
Yunhui Chen |
Abstract Scope |
Laser Blown Powder Directed Energy Deposition (LBP-DED) is one of the principal additive manufacturing techniques for repair applications. However, an increased fundamental understanding of the process is required to avoid such features as porosity, lack of fusion and cracking. This study provides new insights into the manufacturing process using a LBP-DED process replicator that fits onto a synchrotron beamline enabling in situ and operando X-ray imaging. This system provides a better fundamental understanding of the relationships between process parameters and feature formation. Laser-matter interaction and building efficiencies are monitored in situ during multi-layer build conditions using SS316 and Ti6242. Laser power, powder feed-rate and build speed are evaluated for their contributions to the build quality. Micro-CT and electron microscopy are used to verify the in situ observations. These insights reveal how to control the LBP-DED process to tailor the properties of the components produced. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |