About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
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Additive Manufacturing for Energy Industry
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| Presentation Title |
Additive Manufacturing of Cryogenic Austenitic Steel JK2LB via Wire-Fed Directed Energy Deposition (DED) for Fusion Energy Applications |
| Author(s) |
Qingyuan Li, Junye Huang, Randall Volberg, Bonita Jianlin Goh, Xiang Chen, Lianyi Chen |
| On-Site Speaker (Planned) |
Qingyuan Li |
| Abstract Scope |
Fusion reactors, particularly nonplanar stellarator magnet systems, require cryogenic structural materials that can be manufactured into large, complex geometries. This study explores wire-fed DED of JK2LB, a low-Ni, high-Mn austenitic stainless steel developed for ITER conductor jackets. A key feature of this work is the use of customized powder-cored wire feedstock, which offers a practical alternative to costly and commercially limited JK2LB solid wire while enabling compositional flexibility. Using this strategy, JK2LB deposits were fabricated by both laser-DED and arc-DED. Microstructural and compositional analyses show that both routes produced fully austenitic deposits with columnar grains. Room-temperature tensile testing showed yield strength and elongation comparable to ITER-grade JK2LB, although ultimate tensile strength was reduced by Mn loss and coarse columnar grains. These results demonstrate that powder-cored-wire-based DED is a promising route for near-net-shape manufacturing of fusion-relevant JK2LB components and provide a foundation for further feedstock design, process optimization, and cryogenic evaluation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Mechanical Properties |