| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
The Kinetics and Stability of Alpha Prime (α’) Precipitates in FeCr Binary Alloy under Ion Irradiations |
| Author(s) |
Yajie Zhao, Arunodaya Bhattacharya, Cristelle Pareige, Caleb Massey, Jonathan Poplawsky, Pengcheng Zhu, Jean Henry, Steven Zinkle |
| On-Site Speaker (Planned) |
Arunodaya Bhattacharya, Steven Zinkle |
| Abstract Scope |
Cr-enriched α’ precipitates severally degrade the mechanical property of FeCr based Ferritic-Martensitic steels. However, the kinetics and stability of α’ precipitation under higher dose rate ion irradiation conditions are not well understood. In this study, High purity Fe-(10-18%)Cr specimens in either solid solution state or pre-aged to form α’ precipitates were irradiated with 8 MeV Fe ions at 300-450 °C and 10-5-10-3 dpa/s to final doses of 0.37 or 3.7 dpa. The quantification of α’ precipitates after irradiations was performed with atom probe tomography (APT) located at ORNL's CNMS. The critical irradiation condition (temperature and dose rate) for α’ to form was found to be 300 °C and 10-3 dpa/s in Fe18Cr. At conditions where α’ were observed, the evolution of size and number density of precipitates follows an Ostwald ripening mechanism, the kinetics of which is modified by the irradiation dose rate and temperature. |
| Proceedings Inclusion? |
Undecided |