| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Influence of Void Position and Density on Fracture Initiation From Phase-Field Simulation |
| Author(s) |
An Tien Ta, Yixi Shen, R. Seaton Ullberg, Michael R. Tonks, Simon R. Phillpot, Douglas E. Spearot |
| On-Site Speaker (Planned) |
An Tien Ta |
| Abstract Scope |
Mitigating He-induced cracking in irradiated structural materials of light water nuclear reactors requires a thorough understanding of He evolution and cracking mechanisms. To contribute to the understanding of fracture in He bubble containing systems, we use phase-field simulations to examine the influence of voids on Mode I fracture in Fe. Assuming brittle fracture, we conduct two types of nanoscale simulations: systems (1) with one or two voids, and (2) with multiple voids. One and two void simulations showed that voids within 10 nm of a crack tip significantly reduced the far-field stress necessary for crack growth, with a 30o void-to-crack orientation causing the largest reduction. Analytical comparisons with linear elastic fracture mechanics revealed deviations from the principle of superposition of stress, highlighting complex void and crack stress field interactions. As void sizes in multi-void simulations increased, the nearest void to the crack tip exerted the greatest influence on fracture stress. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Iron and Steel, Modeling and Simulation |