| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Exploring the Effect of Various Atmospheric Environmental Parameters on Pit-to-Crack Transition and SCC Failure in SS304 |
| Author(s) |
Daria Bentley, Jenifer Locke |
| On-Site Speaker (Planned) |
Daria Bentley |
| Abstract Scope |
A variety of pit morphologies can occur on stainless steel (SS) used for dry cask nuclear waste storage canisters as a result of varying atmospheric conditions. Pit morphologies at 40% RH have a “cross-hatched” morphology with microcracks on the outer edges, while the classic hemispherical etched pits are seen at 76% RH. This work induces pits of differing morphology onto SS304H to evaluate the transition and initiation into stress corrosion cracking (SCC). SCC crack growth rates (da/dt) in canister relevant brines are also being measured to facilitate integration into a machine learning model designed by a collaborator to predict the likelihood that distinctive pit morphologies transition into cracks. The roles of sub-deformation and atmospheric solution chemistry on the pit-to-crack transition and SCC failure will be understood. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Nuclear Materials, Iron and Steel |