About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials, Processes and Applications for Energy Industry
|
| Presentation Title |
Property Evaluation of CSEF Steels Produced through Wire-Arc Direct Energy Deposition |
| Author(s) |
Yukinori Yamamoto, Wei Tang, Andres Marquez Rossy, Peeyush Nandwana, Saket Thapliyal, Andrzej Nycz, Riley Wallace, William Carter, Chris Masuo, Ben Schaeffer |
| On-Site Speaker (Planned) |
Yukinori Yamamoto |
| Abstract Scope |
This study evaluated high-temperature mechanical properties of Grade 91 ferritic-martensitic (F-M) steels, selected as one of creep-strength enhanced ferritic (CSFE) steels, produced through wire-arc direct energy deposition (WA-DED) process. A tailored alloy design of Grade 91 including “high hardenability in a wide range of cooling rate from austenitization” and “nano-scale carbide formation during tempering” supports long-term stability of high-strength martensitic microstructure at elevated temperatures up to ~650°C. The printed products consisted of fully martensitic microstructure with a variation of prior austenite grain (PAG) sizes and morphologies, similar to Grade 91 welded metals with multi-beads deposition. A proper control of the inter-pass temperature maintaining the substrate above Ms promoted formation of columnar PAGs with continuous fresh martensite. High-temperature tensile and creep properties guided how to optimize the WA-DED process conditions and the post-process heat treatments. The mechanical properties in higher or lower Cr containing CSEF steels will also be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, High-Temperature Materials |