About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Developments in Advanced Nuclear Structural Materials
|
| Presentation Title |
A Novel Processing Approach for Radiation-Tolerant 14YWT Steel for Nuclear Fission Power Reactor Applications |
| Author(s) |
Kevin Jacob, Sid Pathak, Zongyang Lyu, Jordan Tiarks, Nicolas Argibay, Iver Anderson, Hyosim Kim, Stuart Maloy |
| On-Site Speaker (Planned) |
Kevin Jacob |
| Abstract Scope |
An innovative manufacturing process involving gas-atomized reaction synthesis, vacuum hot pressing, and warm rolling has been employed in this study to produce 14YWT-type nanostructured ferritic steel, a dispersoid-strengthened structural alloy with strong promise for high-dose applications in nuclear reactors. Unlike conventional processing that starts with mechanically alloyed particulate for manufacturing reactor components, such as pilgering or hot hydrostatic extrusion, this technique is free from texturing or heterogeneous microstructures. Warm rolling also increased the dislocation density as opposed to the condition with just vacuum hot pressing. Transmission electron microscopy revealed that the increased dislocation density regions act as nucleation sites for Y-Zr-W-based nano-oxides that can act as pinning points for defects from irradiation. Post-rolling aging relieved rolling stresses, resulting in improved hardening and increased tensile strain to failure to ~14% with a yield and ultimate strength of 0.5 and 0.8 GPa, respectively. Work funded by USDOE-NE through Ames Lab contract DE-AC02-07CH11358. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, Mechanical Properties |