About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials for High Temperature Applications: Next Generation Superalloys and Beyond
|
Presentation Title |
Paving the Way Beyond Ni-based Superalloys: Role of Coupled Thermodynamic-kinetic Models |
Author(s) |
Rishi Pillai, Bruce Pint |
On-Site Speaker (Planned) |
Rishi Pillai |
Abstract Scope |
Extensive research has been conducted to achieve optimum mechanical properties while simultaneously balancing environmental resistance of Ni-based superalloys. High temperature oxidation behavior of these materials is complex due to the various alloying additions. A widely used solution to improve oxidation resistance of superalloys employed in gas turbines and jet engines is application of overlay and\or diffusion coatings on a suitable base alloy with required long-term mechanical properties. However, this results in chemical compatibility issues due to coating-substrate interactions driven by differences in chemistry.The present work aims to provide mechanistic understanding of the role of alloy composition, time and temperature on the oxidation behavior and material degradation of coated and uncoated Ni-based superalloys. Coupled thermodynamic-kinetic modelling will be combined with advanced microstructural characterization techniques to predict compositional changes, phase transformations and lifetime. Potential strategies for development of next generation superalloys will be discussed based on the obtained results. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, High-Temperature Materials, Surface Modification and Coatings |