| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Multiple Principal Component Materials
|
| Presentation Title |
Oxidized Surfaces and Deteriorated Subsurfaces of HEAs and MC-Strengthened HEAs Oxidized at High Temperature in Presence of Water Vapor |
| Author(s) |
Patrice Berthod, Lionel Aranda, Ghouti Medjahdi |
| On-Site Speaker (Planned) |
Patrice Berthod |
| Abstract Scope |
High Entropy Alloys of the Cantor family, with modified contents in Mn and Cr, can behave differently in oxidation at high temperature depending on the composition of air, notably concerning the water vapor presence. Thermogravimetry results presented in a poster at TMS 2024 Orlando showed that 180 mbars of water partial pressure led to slower mass gain at 1000°C for a cast Co1Ni1Fe1Mn1.5Cr0.5 alloy and its versions containing either TaC carbides or HfC carbides, as well as different behavior during heating (start of oxidation) and cooling (stability of the oxide scales). It was not possible to present results of metallographic characterization of the oxidized states of the samples. These results are now available and the aim of this work is to present them and use this additional information to interpret the differences of mass variation behavior between dry air and wet air. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Environmental Effects, High-Temperature Materials |