| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments V
|
| Presentation Title |
Superimposed Effects of Texture and Grain Shape Anisotropy on Biaxial Creep Behavior of Nb-Modified Zircaloy-4 Cladding |
| Author(s) |
Mahmoud Y. Hawary, K.L. Murty |
| On-Site Speaker (Planned) |
Mahmoud Y. Hawary |
| Abstract Scope |
Zircaloys play a vital role in thermal nuclear reactors due to their corrosion resistance and mechanical properties. ZIRLOŽ is an Nb-modified zircaloy-4, tailored to enhance these characteristics. Understanding its deformation behavior is critical for maintaining nuclear fuel structural integrity, particularly under biaxial loading. Zircaloys exhibit anisotropy rooted in their crystal structure (HCP) and limited slip systems, resulting in preferred orientations during forming. This study investigates thermal creep of ZIRLOŽ tube in both as-received and fully recrystallized states through creep tests under varied stress ratios. Anisotropy is analyzed using\ Hill's formulation, deriving parameters R and P from hoop and axial creep rates. Creep loci are plotted using the constant energy of dissipation criterion. Crystallographic textures are evaluated using Electron Backscatter Diffraction (EBSD) and X-ray Diffraction (XRD), with texture coefficients employed to assess crystalline orientation distribution functions (CODF). This work is supported by the US National Science Foundation through grant CMMI1727237. |