About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmental Degradation of Multiple Principal Component Materials
|
Presentation Title |
Intermediate and High-Temperature Oxidation Behavior of an Equiatomic CrTaTi Alloy from 800°C to 1400°C |
Author(s) |
Noah J. Welch, Maria Jose Quintana, Todd Butler, Peter Chancellor Collins |
On-Site Speaker (Planned) |
Noah J. Welch |
Abstract Scope |
In some cases, refractory multi principal element alloys (RMPEAs) have been reported to show favorable oxidation resistance at high temperatures (>1000°C). This is due to the concentrated alloying additions, which facilitate the formation of complex oxides that reduce oxidation kinetics compared to simple, deleterious refractory oxides. However, limited work has explored the oxidation behavior of these concentrated alloy systems at intermediate temperatures (600°C-900°C). These regimes can be highly unpredictable due to pesting-like phenomena, oxide volatilization, and thermodynamic shifts in oxide stability. This study explores the oxidation behavior of an equiatomic, two-phase (BCC+Laves) CrTaTi alloy at 800, 1000, 1200, and 1400°C. Thermogravimetric data was collected for 24-hour intermediate and high-temperature tests in air and specific mass change was subsequently measured. Oxidation products and associated kinetics were characterized and compared to other alloy systems and classical oxidation mechanisms. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Environmental Effects, High-Entropy Alloys |