About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing, Directed Energy Deposition of Metals: Processing – Microstructure – Mechanical Property Relationships
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| Presentation Title |
Microstructural Evolution of M250 Steel Fabricated via Laser Wire Directed Energy Deposition |
| Author(s) |
Ann Choi, Clinton Bettner, Justin Warner, Paul Lambert, Bianca Piloseno, Morgana Trexler, Eddie Gienger |
| On-Site Speaker (Planned) |
Ann Choi |
| Abstract Scope |
Laser Wire Directed Energy Deposition (LW-DED) enables efficient fabrication of metallic components but introduces high energy during processing, making microstructural control challenging, especially for alloys like maraging steel 250 (M250), which is highly sensitive to thermal history and post-build heat treatments. In this work, we investigate the microstructural evolution of M250 produced by LW-DED and subjected to different heat treatment conditions. Characterization was conducted using Electron Backscatter Diffraction (EBSD), coupled with Dictionary Indexing, to reveal differences in grain structure, phase distribution, and orientation gradients. Results show microstructural variation through the build height, reflecting complex thermal cycling during deposition. Microstructural features observed from different heat treatments further underscore the need for tailored post-processing strategies. These findings inform improved processing approaches for fabricating M250, targeting consistent performance in high deposition rate additive processes like LW-DED. |