About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
A Mechanistic Understanding of Stress Corrosion Cracking in Stainless Steels Exposed to Chloride-Rich Environments |
| Author(s) |
Ronit Roy, Arya Chatterjee, Soumita Mondal, Haozheng Qu, Janelle P. Wharry |
| On-Site Speaker (Planned) |
Ronit Roy |
| Abstract Scope |
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 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 HR-EBSD and TEM analyses. The deformation fields along the crack path, near the crack tip and internal pits are determined through residual elastic fields, GND density and dislocation imaging. We 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? |
Planned: |
| Keywords |
Environmental Effects, Nuclear Materials, Characterization |