| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Process-induced Microstructures and Defects
|
| Presentation Title |
Additive Manufacturing in Reactive Atmospheres |
| Author(s) |
Christian Felber, Eric Aimé Jägle |
| On-Site Speaker (Planned) |
Christian Felber |
| Abstract Scope |
Additive manufacturing of metals (PBF-LB, DED-LB) is usually performed under argon to protect the materials from oxidation. Replacing the inert atmosphere by a reactive one (e.g. carbon dioxide) allows to manufacture in-situ strengthened materials by an interaction between material and gas. The strength of this interaction and its effect on the microstructure depends on the alloy composition. Especially titanium and titanium-containing materials are ideal candidates for in-situ reactions during processing due to their affinity to react with oxygen and carbon. In-situ oxide dispersion strengthened materials are successfully printed under argon and carbon dioxide using pure iron and iron-titanium powder (blends). The microstructure, especially grain structure and precipitates, such as hardness are affected by the processing atmosphere and composition. Adjusting the process parameters (laser power, scan speed, spot size, layer thickness) enables control over the gas uptake and gives the ability to tune material properties along the build direction of components. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Composites, Iron and Steel |