About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
Mechanistic Understanding of Irradiation Assisted Stress Corrosion Cracking |
Author(s) |
Gary S. Was |
On-Site Speaker (Planned) |
Gary S. Was |
Abstract Scope |
Irradiated austenitic alloys are susceptible to degradation in high temperature water by irradiation assisted stress corrosion cracking (IASCC). While a general understanding of the process is emerging, there are several interesting observations that may now be incorporated into a complete description of the mechanism. It is now known that the local stress at the grain boundaries at sites of dislocation channel impingement plays a critical role. The composition of the surface oxide over the grain boundary is believed to be a key factor, as are oxides that form down the grain boundary. Most recently, grain boundary migration has been observed in irradiated stainless steels. Other factors such as the presence of second phases near grain boundaries and the overall composition of the steel can significantly affect the cracking susceptibility. This paper will provide a mechanistic understanding of the IASCC process to date, incorporating the most recent observations and experimental results. |
Proceedings Inclusion? |
Planned: |
Keywords |
Environmental Effects, Mechanical Properties, Nuclear Materials |