About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Phase Stability in Extreme Environments II
|
Presentation Title |
The Less Understood Impact of Environmental Degradation on Phase Stabilities in High Temperature Alloys |
Author(s) |
Rishi Pillai, Marie Romedenne |
On-Site Speaker (Planned) |
Rishi Pillai |
Abstract Scope |
High temperature alloys typically rely on solid solution or precipitation strengthening for their mechanical properties. However, exposure in corrosive environments drives compositional changes in the alloy subsurface which consequently results in critical depletion of alloy constituents or dissolution of strengthening phases. This work will demonstrate the role of environment and key chemical interactions between alloying constituents in governing these degradation processes through various case studies with uncoated and coated Fe- and Ni-base alloys tested in a wide range of environments such as O2, CO2, H2O, molten halide salts and liquid metals. Advanced thermokinetic modeling will be employed to understand the underlying mechanisms and predict the impact of corrosion-induced degradation on stabilities of strengthening phases and in turn on mechanical properties. The modeling results will be compared with experimental data and microstructural characterization findings. |
Proceedings Inclusion? |
Planned: |
Keywords |
Environmental Effects, High-Temperature Materials, Mechanical Properties |