| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Corrosion and Environmental Degradation: Theory and Practice
|
| Presentation Title |
Pit Morphologies and Crack Propagation of Stainless Steel 304H Using Representative Canister Brine Chemistries |
| Author(s) |
Daria Bentley, Jenifer Locke |
| On-Site Speaker (Planned) |
Daria Bentley |
| Abstract Scope |
Dry cask nuclear waste storage stainless steel canisters encounter varying atmospheric conditions such as salt deposition, temperature, and relative humidity (RH) that impact resultant pit morphologies. Pit morphologies at 40% RH have initiated a “cross-hatched” morphology with subsequent microcracks on the outer edges, which is opposed to the classic hemispherical etched pits seen at 76% RH. This study explores how these different morphologies transition to stress corrosion cracking (SCC) to inform on any differences different canister-relevant environments have on SCC resistance. Pits representative of 40% and 76% RH are being created on stainless steel 304H tensile bars that will then undergo SCC testing to quantify the impact on life. SCC crack growth rate (da/dt) tests are being performed in canister representative environments to determine any effect on da/dt. All results will feed into the larger program machine learning model created by a collaborator to predict pit-to-crack transition. |