| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Nuclear Materials and Fuels with Advanced X-ray and Neutron Techniques
|
| Presentation Title |
Creep Behavior of Advanced Austenitic (Fe-25Ni-20Cr) Alloy 709 through In-situ Neutron Diffraction Characterization and Transmission Electron Microscopy Characterization |
| Author(s) |
Yuchen Zhao, Ryan Michael Schoell, Matthew Frost, Djamel Kaoumi |
| On-Site Speaker (Planned) |
Ryan Michael Schoell |
| Abstract Scope |
Advanced austenitic alloy 709 (Fe-25Ni-20Cr) is a promising candidate as a structural material for advanced reactors like the sodium cooled fast reactors. The various types of precipitates which can form in the material can offer superior creep strength. Accelerated pseudo-creep tests with temperatures ranging from 500 ˚C to 900 ˚C and stresses ranging from 50 MPa to 150 MPa were conducted to probe the creep behavior of the material in situ under neutron diffraction. The evolution of the dislocation density was determined using a modified Williamson-Hall analysis. The creep curves were analyzed using the Bird-Mukherjee-Dorn equation to identify the dominant creep mechanism as dislocation climb. Post-experiment transmission electron microscopy was then used to confirm dislocation climb as well as identify the precipitates involved in the creep mechanism at the various temperature and stress conditions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Nuclear Materials, Iron and Steel |