|About this Abstract
|2022 TMS Annual Meeting & Exhibition
|Environmentally Assisted Cracking: Theory and Practice
|Predicting Electrochemical Conditions in a Stress Corrosion Crack Tip and the Influence of Exposure Environment
|Ryan Katona, Erin Karasz, James Burns, Charles Bryan, Rebecca Schaller, Robert Kelly
|On-Site Speaker (Planned)
Metallic structures are commonly exposed to marine atmospheric conditions, characterized by thin water layers (WL), allowing for corrosion to occur. For austenitic stainless steels, pitting and stress corrosion cracking (SCC) are potential degradation mechanisms. The rate and extent of corrosion and SCC on the alloy surface is dictated by the combination of environmental, physicochemical, and geometric variables. Due to the large potential variation in environmental conditions, modeling can serve as an important tool to evaluate environmental effects. Finite Element Modeling is used to evaluate electrochemical conditions in a crack exposed to marine environments. A reactive transport model was developed to evaluate SCC crack tip conditions. The influence of WL thickness, chloride concentration, stress intensity, crack length, and specimen geometry are evaluated. The modeling results will give insight into testing phenomena.
SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. SAND2021-8237 A.
|Environmental Effects, Iron and Steel, Modeling and Simulation