About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
In Search of a Grain Boundary Structure Factor to Predict Stress Corrosion Cracking in Nickel-Based Alloys |
| Author(s) |
Lucy Strazis, Benjamin Anglin, Ainsley Pinkowitz, Peter Hosemann |
| On-Site Speaker (Planned) |
Lucy Strazis |
| Abstract Scope |
As advanced nickel-based alloys become ubiquitous in replacing the stress corrosion cracking (SCC) susceptible Alloy 600 in nuclear reactors, understanding their corrosion behavior is critical to establish confidence in their long-term performance. Preferential intergranular oxidation contributes to crack propagation in these alloys after the surface oxide ruptures, but the grain boundary (GB) structure factors that determine which GBs develop oxides are still in contention.
In depth characterization of the crack tip oxide and the adjacent GBs of nickel-based alloys that underwent environmentally assisted cracking will be performed. A complete description of the GB structure and oxide will elucidate that which makes certain GB more susceptible to SCC. Common GB characteristics such as misorientation angle and GB atomic packing density will be studied. Additional exploration will include characteristics that determine stress/strain states along GB and GB slip transmissibility, which have shown potential to be reliable SCC predictors for other austenitic alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Thin Films and Interfaces, Other |