Abstract
In this study, we performed fracture toughness characterization of ten neutron-irradiated Eurofer97 variants using precracked miniature multi-notch bend bar (M4CVN) specimens based on the Master Curve method in the ASTM E1921 standard. The neutron irradiation was performed in the flux trap position of the High Flux Isotope Reactor (HFIR) of the Oak Ridge National Laboratory (ORNL) with the nominal irradiation temperature of 300°C and irradiation dose of 2.5 displacements per atom (dpa). Depending on the irradiation temperature and materials, we observed different degrees of irradiation hardening and embrittlement for ten Eurofer97 variants. The upper shift in the Master Curve reference temperature T0Q vs. the increase in Vickers microhardness values showed a liner relationship for only a few materials indicating different irradiation responses of the Eurofer97 variants.
| Original language | English |
|---|---|
| Title of host publication | Codes and Standards |
| Publisher | American Society of Mechanical Engineers (ASME) |
| ISBN (Electronic) | 9780791883815 |
| DOIs | |
| State | Published - 2020 |
| Event | ASME 2020 Pressure Vessels and Piping Conference, PVP 2020 - Virtual, Online Duration: Aug 3 2020 → … |
Publication series
| Name | American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP |
|---|---|
| Volume | 1 |
| ISSN (Print) | 0277-027X |
Conference
| Conference | ASME 2020 Pressure Vessels and Piping Conference, PVP 2020 |
|---|---|
| City | Virtual, Online |
| Period | 08/3/20 → … |
Funding
This study was supported by the U.S. Department of Energy, Office of Fusion Energy Sciences under contract DE-AC05-00OR22725 and Karlsruhe Institute of Technology under contract NFE-16-06240 with ORNL managed by UT Battelle, LLC. A portion of this research at ORNL's High Flux Isotope Reactor was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy. This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. We would like to acknowledge the colleagues who developed, produced, prepared, and provided the different steel grades: CEA (J. Henry), SCK-CEN (A. Puype, L. Malerba), ENEA (C. Cristalli, L. Pilloni), CSM (O. Tassa), KIT (J. Hoffmann), and OCAS (N. de Wispelaere). In addition, we would like to thank E. Manneschmidt and R. Swain from ORNL for performing part of mechanical testing. The authors are also grateful for colleagues at the ORNL Irradiated Materials Examination and Testing Facility for their assistance during hot cell testing. Keywords: Eurofer97, Fracture Toughness, Master Curve, Small Specimen Testing Technique, Miniature multi-notch bend bar, Fusion Notice: This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). This study was supported by the U.S. Department of Energy, Office of Fusion Energy Sciences under contract DE-AC05-00OR22725 and Karlsruhe Institute of Technology under contract NFE-16-06240 with ORNL managed by UT Battelle, LLC. A portion of this research at ORNL’s High Flux Isotope Reactor was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy. This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. We would like to acknowledge the colleagues who developed, produced, prepared, and provided the different steel grades: CEA (J. Henry), SCK-CEN (A. Puype, L. Malerba), ENEA (C. Cristalli, L. Pilloni), CSM (O. Tassa), KIT (J. Hoffmann), and OCAS (N. de Wispelaere). In addition, we would like to thank E. Manneschmidt and R. Swain from ORNL for performing part of mechanical testing. The authors are also grateful for colleagues at the ORNL Irradiated Materials Examination and Testing Facility for their assistance during hot cell testing.
| Funders | Funder number |
|---|---|
| Euratom research and training programme 2014-2018 | 633053 |
| Office of Basic Energy Sciences | |
| Scientific User Facilities Division | |
| US Department of Energy | |
| U.S. Department of Energy | |
| Battelle | |
| Fusion Energy Sciences | DE-AC05-00OR22725 |
| Oak Ridge National Laboratory | |
| Colorado School of Mines | |
| California Earthquake Authority | |
| Karlsruhe Institute of Technology | NFE-16-06240 |
| European Neuroendocrine Association | |
| Korea Institute of Toxicology | |
| OCAS |
Keywords
- Eurofer97
- Fracture Toughness
- Fusion
- Master Curve
- Miniature multi-notch bend bar
- Small Specimen Testing Technique