About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Material Responses Investigated Through Novel In-Situ Experiments and Modeling
|
| Presentation Title |
How Does Irradiation, Microstructure and Temperature Affect Deformation in Ferritic-Martensitic Steels |
| Author(s) |
Dave Lunt, Benjamin Poole, Rhys Thomas, Jack Donoghue, Ed Pickering, Cory Hamelin, Chris Hardie |
| On-Site Speaker (Planned) |
Dave Lunt |
| Abstract Scope |
Ferritic/martensitic (FM) steels are candidate materials for tritium breeding blanket designs within STEP because of their superior resistance to irradiation swelling compared to austenitic steels. However, FM steels suffer from reduced strength at elevated temperatures, the mechanisms for which are microstructurally driven. Therefore, we investigate deformation mechanisms at the microstructural scale by conducting monotonic tensile tests on FM steels with different underlying microstructures at room temperature in a non-irradiated and pre-irradiated condition. To understand the change in deformation mechanisms with temperature the non-irradiated material was tested to a temperature of 350°C. These tests were performed in-situ in a Scanning Electron Microscope to capture and quantify the deformation characteristics using High Resolution Digital Image Correlation (HRDIC). The material response was directly linked to the microstructure by orientation mapping and this data will be then used to develop models with predictive capability for the STEP materials validation strategy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Nuclear Materials, Characterization |