| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advancing Current and State-of-the-Art Application of Ni- and Co-based Superalloys
|
| Presentation Title |
A Damage Model with Oxidation Effects |
| Author(s) |
Jean-Briac le Graverend, Seungjun Lee |
| On-Site Speaker (Planned) |
Jean-Briac le Graverend |
| Abstract Scope |
When superalloys are exposed to oxidizing environments, the growth of the oxide scale can affect the microstructural stability and, therefore, their mechanical behavior and lifetime. The fundamental reason of this phenomenon is the depletion process of the γ’ precipitates during the formation of the oxide scale. γ’ depletion is equivalent to have a decrease in the load carrying capacity, as pores in a continuum damage mechanics approach. The oxidation kinetics is not only affected by temperature, but also by surface roughness and plastic strain. A surface-rougheness and accumulated-plastic-strain dependent model is developed for the oxide thickness and is employed in a hardening-based damage model. The new damage model is validated with 3D finite-element simulations. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |