About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
The Effects of Aging on Precipitation Behaviors and Elemental Segregation in Maraging Steel Processed by Wire-Arc Directed Energy Deposition |
| Author(s) |
Kyrus Tsai, Ella Hewlett, Anastasios Gavras, Marius Ellingsen, Evan Coronado, Aaron Nardi, Mark Aindow |
| On-Site Speaker (Planned) |
Kyrus Tsai |
| Abstract Scope |
Wire-arc directed energy deposition (DED) is a large-scale additive manufacturing (AM) process that involves deposition rates far exceeding those of most other AM techniques. The length scales of the microstructures in wire-arc DED builds are correspondingly larger, and this results in some interesting microstructural development effects. Comparing these microstructural phenomena to those in conventionally processed samples of the same alloys is critical to defining the application space for these AM materials. Here the microstructural development in as-deposited and heat-treated wire-arc DED samples of the alloy maraging 250 have been compared with those in wrought material subject to the same heat-treatments. It is shown that segregation of Mo in the wire-arc DED samples has a significant effect on the character, orientation relationships and distribution of the precipitates formed upon aging, and leads to austenite reversion at boundaries. The implications of these observations for the mechanical behavior will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Phase Transformations |