About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
On the Coupled Effects of Hydrogen Diffusion and Hydride Precipitation in Zirconium Alloys |
Author(s) |
Alireza Tondro, Hamidreza Abdolvand |
On-Site Speaker (Planned) |
Alireza Tondro |
Abstract Scope |
Hydrogen diffusion directly affects the lifespan and in-service performance of nuclear reactor core components. The state of stresses is one of the main factors in hydrogen redistribution. This study uses a coupled mass diffusion and crystal plasticity finite element approach to simulate the hydrogen distribution as a result of localized stresses that develop during external loadings and formation of hydrides. The effects of hydride induced transformation strain on hydrogen distribution are studied using different cases of intergranular and intragranular hydrides. Results suggest that, due to hydrostatic stresses, the highest and lowest hydrogen concentrations take place respectively at the hydride tips and hydride sides. This results in axial propagation of hydrides. Also, hydride tips in the vicinity of harder grains are more probable to grow. The interactions between hydrogen diffusion and deformation twins are also studied where the results show that hydrogen atoms tend to diffuse towards the twin tips. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Other, Modeling and Simulation |