About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Advanced Materials for Harsh Environments
|
| Presentation Title |
High-Temperature Oxidation Behavior of TiNb-Based Multi-Principal Element Alloys at 600-1100 °C |
| Author(s) |
Isabela Dainezi, Francisco Gil Coury |
| On-Site Speaker (Planned) |
Isabela Dainezi |
| Abstract Scope |
Refractory multi-principal element alloys (RMPEAs) are promising for high-temperature applications due to their mechanical strength, thermal stability, and compositional flexibility. However, their degradation under oxidative environments remains insufficiently understood. This work investigates the high-temperature oxidation behavior of TiNb-based MPE alloys in air between 600 and 1100 °C under isothermal exposure for up to 100 h. Their performance was compared with commercial Ni-based alloy 625, commonly used in oxidizing conditions. Post-exposure characterization using SEM/EDS and XRD enabled the identification of scale morphology, oxide phase formation, and degradation mechanisms across the investigated temperature range. The TiNb-based alloys exhibited distinct oxidation kinetics and oxide layer architectures depending on temperature, revealing the role of multi-principal element interactions in oxide nucleation and growth. These findings contribute to a deeper understanding of high-temperature oxidation mechanisms in TiNb-based RMPEAs and offer guidance for optimizing their compositional design for harsh service environments. |