About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Special Topics in Nuclear Materials: Reproducibility and Uncertainty; Hydrogen Effects; Space and Microreactor Systems
|
| Presentation Title |
Insights Into Radiation-Induced Ductility Enhancement of Inconel 718 Using In-Situ SEM-EBSD Tensile Testing |
| Author(s) |
Soyoung Kang, Maxim Gussev, Tim Lach, David McClintock |
| On-Site Speaker (Planned) |
Soyoung Kang |
| Abstract Scope |
Inconel 718 was employed as the material for the fourth operational proton beam window (PBW-4) at the Spallation Neutron Source. After operation, samples were harvested from PBW-4 and subjected to tensile tests to evaluate their mechanical properties. The results demonstrated that ductility improved at higher radiation doses, which serves as the motivation for this study. In-situ tensile tests in a scanning electron microscope combined with an electron backscatter diffraction (EBSD) detector was utilized to investigate the microstructural evolution during the deformation of the irradiated 718 specimens. Common EBSD data, such as image quality and inverse pole figures, were analyzed throughout the deformation process. Misorientation parameters, including kernel average misorientation (KAM), were correlated with deformation strain, with the slope of this correlation being linked to the radiation dose. Additionally, the geometrically necessary dislocation density within the grains was assessed based on KAM to illustrate the evolution of plastic flow during deformation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Mechanical Properties, Characterization |