About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmental Degradation of Multiple Principal Component Materials
|
Presentation Title |
Isothermal High Temperature Oxidation of Cantor’s–based MC–reinforced HEAs Versus Their Mn and Cr Contents |
Author(s) |
Pauline Spaeter, Nassima Chenikha, Corentin Gay, Lionel Aranda, Patrice Berthod |
On-Site Speaker (Planned) |
Patrice Berthod |
Abstract Scope |
The behaviors in oxidation at high temperature of a cast Cantor’s alloy, and of its derived versions involving MC carbides for mechanical reinforcement purpose, are characterized by external and internal corrosion products which are multi–constituted, due to the involvement of manganese in addition to chromium. In this work, content decrease in Mn content was tested simultaneously with increase in Cr content to observe, with thermogravimetry follow-up and metallography characterization, how the isothermal mass gain kinetics at several high temperatures in the [1,000 – 1,100°C] are influenced by such changes of the chemical composition. The isothermal kinetics stay parabolic but become much slower, and the Kp values much lower but still above the ones obtained with really chromia–forming alloys. Despite the significant increase in the Cr/Mn ratio Mn still interferes with the chromia formation, suggesting that complete Mn removal may be unavoidable to maximize oxidation resistance. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Environmental Effects, High-Temperature Materials |