| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior of Nuclear Reactor Components
|
| Presentation Title |
Atom-probe Study of Nano-hardening Features in Neutron Irradiated RAFM Steels |
| Author(s) |
Arunodaya Bhattacharya, Philip Edmondson, Hiroyasu Tanigawa, Takashi Nozawa, Josina Wilna Geringer, Yutai Katoh, Michael Rieth |
| On-Site Speaker (Planned) |
Arunodaya Bhattacharya |
| Abstract Scope |
Reduced activation ferritic-martensitic (RAFM) steels are currently the most promising structural material candidates for the plasma-near components of fusion energy systems. A critical concern is the irradiation-induced low-temperature hardening/embrittlement (LTHE) causing fracture toughness loss in RAFM steels. LTHE is historically attributed to hardening by dislocation loops, and other potential nano-clustering features such as Cr rich clusters. However, a fundamental mechanistic understanding of LTHE is not well-established. At ORNL, numerous RAFM steel concepts such as F82H/Eurofer97 were neutron irradiated at the High Flux Isotope Reactor (HFIR) at 300 °C to a variety of doses ranging from <5 dpa to >60 dpa. Using atom-probe tomography (APT), we will elucidate the nano-clustering behavior in the neutron irradiated RAFM steels to reveal the key solute nano-clustering mechanisms contributing to the LTHE phenomenon. Research sponsored the U.S. Department of Energy, Office of Fusion Energy Sciences under contract DE-AC05-00OR22725 with UT-Battelle LLC. |
| Proceedings Inclusion? |
Planned: |