About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2025
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2025
|
| Presentation Title |
Evolution of Chloride-Induced Stress Corrosion Cracks in 304L Stainless Steels: A Mechanical Perspective |
| Author(s) |
Ronit Roy, Arya Chatterjee, Soumita Mondal, Haozheng Qu, Janelle Wharry |
| On-Site Speaker (Planned) |
Ronit Roy |
| Abstract Scope |
The primary objective of this study is to investigate the mechanical aspects of chloride-induced stress corrosion cracking (CISCC) in austenitic stainless steel. CISCC is a critical degradation mode in austenitic stainless steel nuclear waste canisters, so understanding its mechanisms is essential for predicting material integrity and lifetime. Previous mechanistic work on CISCC in stainless steels investigated the role of texture on crack propagation and its resultant plasticity. In this study, the step-by-step evolution of CISCC cracks is correlated with the grain-scale plasticity, and the formation of internal pits during the crack propagation is explained in terms of deformation fields using high-resolution electron backscatter diffraction (HR-EBSD) and transmission electron microscopy (TEM). The deformation fields along the crack path, near the crack tip and internal pits are determined through residual elastic fields, geometrically necessary dislocations and dislocation imaging. We will show that CISCC fields are strongly influenced by grain-scale plasticity, and the internal pits are correlated with the crack propagation speed in a grain. These results imply that grain texture can be used to predict and mitigate CISCC propagation in austenitic stainless steel. |
| Proceedings Inclusion? |
Undecided |