| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Impact of Helium Bubbles on Fracture Stress From Phase Field Simulations |
| Author(s) |
An Tien Ta, Yixi Shen, Michael Tonks, Doug Spearot, Simon R. Phillpot |
| On-Site Speaker (Planned) |
An Tien Ta |
| Abstract Scope |
Helium bubbles are common defects that form in structural components during reactor operation. After years of service, the concentration of these defects increases and can cause degradation to the mechanical strength of the component, especially in relation to fracture. However, the precise impact of nano-scale voids and helium bubbles on micron-scale fracture is still unclear. Here, the implications of nano-scale helium bubbles and voids on crack propagation were investigated using phase field (PF) modeling under the assumptions of linear elastic fracture mechanics (LEFM). Verification of our model to theory and the effects of various void sizes on fracture stress will be presented and discussed. It was found that void sizes can change the observed fracture stress, which has implications for defining reference states when comparing simulation results. A relationship between void distribution and fracture stress, derived from our simulations, will also be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Computational Materials Science & Engineering, Modeling and Simulation |