| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
How Irradiation Induces Intergranular Stress Corrosion Cracking in Stainless Steels |
| Author(s) |
Gary S. Was |
| On-Site Speaker (Planned) |
Gary S. Was |
| Abstract Scope |
Stainless steels are susceptible to degradation in high temperature water by IASCC (irradiation assisted stress corrosion cracking). IASCC is ubiquitous across all water reactor designs and affects components made from a range of iron- and nickel-base austenitic alloys. While a general understanding of the process has been slowly emerging, there are several key observations that may now be incorporated into a complete description of the mechanism. It is now known that grain boundary oxidation diminishes the grain boundary strength with extended exposure time. Grain boundaries at sites of discontinuous dislocation channel impingement have a high probability of failure due to high local stresses and a degraded state. Finally, the role of silicon in the IASCC process has been elucidated. This talk will provide a mechanistic understanding of the IASCC process, as well as answers to numerous “oddities” and misconceptions, as well as potential strategies for mitigation and alloy development. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Nuclear Materials, Other |