| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Measurement and Modeling of Grain Scale Tensorial Stresses in Notched Zirconium Specimens: 3D-XRD vs CPFE |
| Author(s) |
Karim Louca, Katherine Shanks, Darren Pagan, Hamidreza Abdolvand |
| On-Site Speaker (Planned) |
Karim Louca |
| Abstract Scope |
Understanding the impacts of cracks and notches on material behaviour in ductile alloys is crucial for developing macro- and microscale predictive models. The impact of microstructure near flawed geometries can be significant to the material’s fatigue behaviour, specially in hexagonal close-packed (HCP) crystals with a high degree of elastic and plastic anisotropy. In this study, three-dimensional synchrotron X-ray diffraction (3D-XRD) is employed to investigate the effects of different notches on the grain-resolved tensorial stresses near the notch tips in pure zirconium specimens. The “as-measured” microstructures and notch geometries are subsequently imported into a crystal plasticity finite element (CPFE) model to simulate the evolution of stress, strain, and rotation fields. Results show that load sharing between different grain orientations contributes significantly to the stress development in the vicinity of notches. As a result, grains with similar orientations undergo different plastic strain rates, depending on their positions with respect to the notch. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nuclear Materials, |