| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
Thermal Annealing and Irradiation Behavior of Ultrafine-grained and Nanocrystalline FeCrAl Alloys |
| Author(s) |
Haiming Wen, Maalavan Arivu, Rinat Islamgaliev |
| On-Site Speaker (Planned) |
Maalavan Arivu |
| Abstract Scope |
FeCrAl alloys are leading candidate materials for cladding of accident tolerant fuels in light water reactors replacing Zircaloy owing to their high temperature strength and corrosion resistance in steam environments. However, FeCrAl alloys suffer from embrittlement after long-time aging at ~500 oC and lower, due to α’ Cr precipitation. This phenomenon is detrimental to the structural performance and corrosion resistance. Another major issue for FeCrAl alloys in nuclear environments is the irradiation-enhanced α′ precipitation, leading to irradiation-induced hardening and embrittlement. 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. In this study, ultrafine-grained and nanocrystalline FeCrAl alloys were manufactured by equal-channel angular pressing and high-pressure torsion, respectively. The thermal annealing and irradiation behavior of these materials were carefully studied. Results indicated that reducing grain size can hinder both thermally induced and irradiation enhanced α’ Cr precipitation. |
| Proceedings Inclusion? |
Undecided |