| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
As-Cast Microstructure, Hardness and High Temperature Creep Behavior of an Equimolar CoNiFeCr Alloy; Effects of a Ti or Ta Addition |
| Author(s) |
Yasmina El Hadad, Lyna Amrouche, Romin Chevalme, Siouare Hammi, Lionel Aranda, Patrice Berthod |
| On-Site Speaker (Planned) |
Patrice Berthod |
| Abstract Scope |
The equimolar CoNiFeCr composition can be considered as a Mn-free Cantor alloy. Removing manganese allowed improving significantly its hot oxidation resistance in air, even for temperatures up to 1200°C. Another beneficial consequence of Mn suppression is potentially a much better creep-resistance, which is also expected to increase with addition of Ti and Ta. This is what was explored in this work. After microstructure and hardness control by electron microscopy and Vickers indentation (load: 1kg), flexural creep tests were carried out at 1200°C for a centered 3 points bending solicitation under constant load inducing locally 10 MPa as maximal tensile stress. Concerning the creep behavior, the CoNiFeCr alloy deformed much slower than the Cantor alloys. The versions alloyed with Ti and Ta resisted creep better than the former alloy. The Ta-containing CoNiFeCr alloy demonstrated the best resistance, with a particularly slow deformation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, High-Temperature Materials, Mechanical Properties |