About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Environmental Degradation of Multiple Principal Component Materials
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Presentation Title |
Behavior in Cooling–induced Oxide Scale Spallation of Original and Modified Cantor’s HEA Alloys Oxidized at High Temperature |
Author(s) |
Nassima Chenikha, Corentin Gay, Pauline Spaeter, Lionel Aranda, Patrice Berthod |
On-Site Speaker (Planned) |
Patrice Berthod |
Abstract Scope |
Cast Cantor’s alloys, and derivatives issued from Mn and Cr contents modifications and/or MC (TaC and HfC) carbides in situ formation, suffer more or less from oxide spallation at cooling. To investigate the dependence of this phenomenon on the alloy chemical composition and on the single–phased or double–phased state of the alloys, several alloys were first exposed to isothermal oxidation, and second to cooling down to room temperature with mass variation recording. The differences between the isothermal oxidation temperature and the temperature of mass loss start, the sequences of the following steps of spallation and the final spallation–induced mass loss were analyzed as functions of the chemical and microstructural characteristics of the alloys. This evidenced the influences, on oxide spallation at cooling, of the Cr/Mn ratio and of the presence or not of the MC carbides. These observations led to recommendations for thermal cycling conditions in service. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Environmental Effects, High-Temperature Materials |