| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments II
|
| Presentation Title |
Ultrafine-grained and Nanocrystalline Steels for Nuclear Applications |
| Author(s) |
Haiming Wen, Joshua Rittenhouse |
| On-Site Speaker (Planned) |
Haiming Wen |
| Abstract Scope |
Bulk ultrafine-grained and nanocrystalline metals possess drastically higher strength than their conventional coarse-grained counterparts, and are anticipated to have significantly enhanced irradiation tolerance owing to the role of grain boundaries. In this study, ultrafine-grained and nanocrystalline austenitic and ferritic steels were manufactured by equal-channel angular pressing (ECAP) and high-pressure torsion (HPT), respectively. The microstructure and mechanical behavior of the steels manufactured by ECAP and HPT were carefully studied. The thermal stability of the ultrafine-grained and nanocrystalline steels was also investigated. Ion irradiation and neutron irradiation were performed to study irradiation behavior of the steels. Irradiation-induced defects in ultrafine-grained and nanocrystalline steels were significantly less than those in the coarse-grained counterparts. After neutron irradiation, ultrafine-grained and nanocrystalline steels retained their ductility significantly better than their coarse-grained counterparts, although they are less ductile than their coarse-grained counterparts before irradiation. All these results indicate enhanced irradiation tolerance of ultrafine-grained and nanocrystalline steels. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Iron and Steel, Phase Transformations |