About this Abstract |
Meeting |
MS&T25: Materials Science & Technology
|
Symposium
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Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments VI
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Presentation Title |
Comparative Assessment of Biaxial Creep Anisotropy in ZIRLOŽ and HANA-4 Zirconium Alloys: Influence of Microstructure and Processing |
Author(s) |
Mahmoud Y. Hawary, K.L. Murty |
On-Site Speaker (Planned) |
Mahmoud Y. Hawary |
Abstract Scope |
Zirconium-based alloys, particularly ZIRLOŽ and HANA-4, are essential for nuclear fuel cladding due to their exceptional mechanical properties and radiation resistance. This research comparatively assesses the anisotropic biaxial creep behavior of these Nb-containing alloys in cold-worked stress-relieved (CWSR) and recrystallized (Rx) conditions. Internally pressurized tubing was tested under varying hoop-to-axial stress ratios (0–2), and anisotropy was quantified using modified Hill criterion parameters and formability analysis. Creep loci constructed at constant energy dissipation demonstrated deviations from isotropy across processing conditions. Microstructural influences, including crystallographic texture and grain shape, were examined through electron backscatter diffraction (EBSD) to correlate orientation distributions and grain aspect ratios with creep response. Additionally, temperature and stress effects were analyzed to elucidate deformation kinetics and identify underlying mechanisms. Results emphasize that microstructural evolution and processing significantly influence creep anisotropy, highlighting critical pathways for optimizing zirconium alloys to enhance long-term reactor performance and safety. |