|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors VII
||Mechanical Property Measurements of Zicaloy Hydride Structure by Using Nanoindentation and Nano Mechanical Raman Spectroscopy
||Hao Wang, Vikas Tomar
|On-Site Speaker (Planned)
Waterside corrosion of zirconium-alloy (zircaloy) cladding introduces hydrogen precipitates which decrease the ductility of the cladding and may lead to failure. Therefore, understanding the mechanical property of zircaloy hydride rim structures is very crucial to the safety of power plants. In this work, hydrogen is charged into zircaloy-4 samples to get hydride rim structures. Both optical microscope and Electron Backscatter Diffraction (EBSD) are used to characterize the precipitates distribution. To derive a plasticity model for zircaloy hydride structure, nanoindentation experiments are performed from room temperature to 300℃ to determine the mechanical properties of hydride structure with different hydrogen concentration levels. Combining nanoindentation obtained material properties and this plasticity model, a FEM model is developed to predict the stress distribution around a notched sample during a three-point bending test. The prediction is further validated by Nano Mechanical Raman Spectroscopy (NMRS) measurement. Good agreement is observed between the simulation and experimental results.
||Planned: Supplemental Proceedings volume