| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
The Effects of Molybdenum Segregation on Mechanical Behavior in Maraging Steel Processed by Wire Directed Energy Deposition |
| Author(s) |
Kyrus Tsai, Jay Scala, Rumman Ahsan, Patrick Grace, Sean Langan, Victor K Champagne, Seok-Woo Lee, Mark Aindow |
| On-Site Speaker (Planned) |
Kyrus Tsai |
| Abstract Scope |
Wire directed energy deposition (wire-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-DED builds are correspondingly larger, and this results in some interesting microstructure property relationships. In our work we have shown that there is a Hall-Petch-type relationship between dendrite arm spacing and indentation hardness in coarse-grained maraging 250 steel produced by wire-DED. This phenomenon can be related to the pronounced segregation of Mo during dendritic solidification. It is shown that the segregation of Mo to the dendrite boundaries leads to precipitation of intermetallic compounds, such that these boundaries then act as effective obstacles to dislocation motion. The consequences of these observations for the properties of wire-DED maraging steels as a function of deposition and post-build heat treatment parameters are discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Iron and Steel |