| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Pit-to-Crack Transition in Stress Corrosion Cracking of Type 304 Stainless Steels Under Marine Exposure Conditions |
| Author(s) |
Alana Parey |
| On-Site Speaker (Planned) |
Alana Parey |
| Abstract Scope |
Stress corrosion cracking (SCC) poses a threat to austenitic stainless steels when exposed to chloride containing environments during the storage of nuclear waste. The temperature of the canisters decreases over time, during which dust and deliquescent salts lead to the formation of a chloride-rich brine surface environment. Previous laboratory studies often focus on either pit initiation and growth or on crack growth kinetics from a fatigue fractured pre-crack, however, these studies often focus on either pit initiation and growth or on crack growth from a precrack. This study aims to identify the mechanism for the pit-to-crack transition in SCC for type 304 stainless steel in atmospheric marine environments. Experiments will focus on seawater brine conditions that produce microcracking in the absence of externally applied stresses, which is due to residual stresses present on the surface resulting from surface finishing. Testing of these conditions will follow intermittent ripple loading techniques. |