| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials in Energy Environments II
|
| Presentation Title |
Microstructure Control of Ferritic-Martensitic Steels during Wire-Arc Direct Energy Deposition Process |
| Author(s) |
Yukinori Yamamoto, Wei Tang, Saket Thapliyal, Peeyush Nandwana, Riley Wallace, William Carter, Andrzej Nycz, Ben Schaeffer |
| On-Site Speaker (Planned) |
Yukinori Yamamoto |
| Abstract Scope |
Ferrous alloys are attractive in many structural applications, especially for energy production sector, as one of the key factors to achieve a clean energy revolution. This study evaluated microstructure evolution of steels with ferritic-martensitic transformation such as Grade 91, 410 stainless steels, 17-4PH, and Maraging steels during wire-arc direct energy deposition process, targeting optimization of materials performance of the printed products with minimized or eliminated post-process heat treatments. Major interests include understanding the role of phase transformation on microstructure control, such as delta-phase formation, recrystallized prior austenite grain formation, fresh/over-tempered martensite, and defect formation. They were strongly correlated with the inter-pass temperature, suggesting an importance of thermokinetics control as well as requirements of toolpath design or external heat-source to control the phase transformation during deposition or subsequent cooling process. High-temperature mechanical properties will also be discussed. Research sponsored by US DOE Advanced Materials & Manufacturing Technologies Office. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Iron and Steel, |