| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Multiple Principal Component Materials
|
| Presentation Title |
Oxidation of Different High Entropy Alloys Under the Influence of Water Vapour |
| Author(s) |
Mary-Lee Brückner, Lukas Mengis, Emma White, Mathias C. Galetz |
| On-Site Speaker (Planned) |
Mathias C. Galetz |
| Abstract Scope |
Multi-Principal Element Alloys (MPEAs) have drawn a lot of scientific attention recently due to their unique, sometimes record-breaking, properties. In this work, the oxidation behavior of FeCoCrNiMn with small modifications, exchanging Mn for Al, Cu, and Al + Cu was investigated between 600 - 800 °C in synthetic air, as well as in synthetic air + 10 vol.% H2O. Across all compositions substitution of Mn leads to a significant improvement in oxidation resistance. For FeCoCrNiCu, a local attack of Cu-rich phases was observed along with internal Cr2O3. This selective oxidation was inhibited by the addition of Al, which formed a protective Al2O3 layer in all compositions. FeCoCrNiAl formed different types of Al2O3 (α-Al2O3 and θ-Al2O3), while FeCoCrNiCuAl only exhibits corundum. Several effects of water vapor are also noted such as needle-like surface structures or an impact on observed nitridation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, High-Temperature Materials, Environmental Effects |