About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Nanostructured Materials in Extreme Environments
|
Presentation Title |
A New Type of Nuclear Materials: Nanocrystalline ODS Steels |
Author(s) |
Tongde Shen |
On-Site Speaker (Planned) |
Tongde Shen |
Abstract Scope |
Nanocrystalline metals are often radiation tolerant but with a relatively low thermal stability under high temperature and/or irradiation environments. We have recently used thermodynamic and kinetic approaches to stabilizing and processing a 304L-type nanocrystalline austenitic ODS steel. This steel has extremely high yield strength between 2 and 3 GPa, a high thermal stability of approx. 1000 oC, extremely high creep resistance (with a steady creep rate of approx. 10-7 s-1 at 700 oC and 500 MPa), high oxidation resistance in air at 1000 oC, low radiation hardening, high structure stability against high-temperature irradiation, and extremely high resistance against radiation-induced swelling and helium bubble coarsening. In addition, 9Cr ferritic/martensitic- and 14Cr ferritic-type nanocrystalline ODS steels with similarly exceptional properties have been also processed. The underlying mechanisms for these excellent properties are analyzed. Our work should help design a new type of nuclear materials with improved performances for extreme environments. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Nuclear Materials, Process Technology |