| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Chemistry Effects on α' Precipitation in FeCrAl Alloys |
| Author(s) |
Andrew K. Hoffman, Soumya Nag, Chen Shen, Chao Jiang, Yongfeng Zhang, Raul B. Rebak |
| On-Site Speaker (Planned) |
Andrew K. Hoffman |
| Abstract Scope |
FeCrAl alloys have been shown to have excellent high temperature steam oxidation resistance due to Al forming a passive oxide layer making them an excellent candidate for accident tolerant nuclear fuel cladding. There are concerns, however, that at normal light water reactor operating temperatures (~300°C) precipitation of a Cr-enriched α’ phase can lead to issues with embrittlement and corrosion. While α’ has been well studied in Fe-Cr ferritic steels, little work has been conducted on the alloying effects of Al in the FeCrAl ternary system. Previous thermal aging studies at 475°C indicate that Al can enhance α’ precipitation at lower concentrations and suppress precipitations at high concentrations. In this aging study we show that while Al can enhance the precipitation kinetics of α’, it lowers the α-α’ miscibility gap. Additionally, the effects of Mo addition (common to commercial alloys) to this system will also be discussed. |
| Proceedings Inclusion? |
Planned: |