| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Bcc-Superalloys
|
| Presentation Title |
High temperature deformation of precipitation-strengthened refractory high entropy alloys |
| Author(s) |
Martin C. Heilmaier, Liu Yang, Sandipan Sen, Daniel Schliephake, Raja Jothi Vikram, Aparajita Pramanik, Ankur Chauhan, Alexander Kauffmann |
| On-Site Speaker (Planned) |
Martin C. Heilmaier |
| Abstract Scope |
Refractory high entropy alloys show great promise for high-temperature structural applications. However, the crucial aspect of creep resistance, essential for structural materials at elevated temperatures, has only been briefly addressed in literature sofar. Our approach in the Ta-Mo-Ti-Cr-Al system has confirmed the existence of a two-phase microstructure with a disordered A2 matrix and ordered B2 precipitates in a certain compositional range. A stable ultrafine particle microstructure even after prolonged exposure to elevated temperatures is observed. We present here the current status of investigations into the creep behavior of this B2 precipitation-strengthened A2 alloy. Compression creep tests were conducted at elevated temperatures close to the solvus temperature and above, with varying constant true stresses to unveil the creep deformation behavior and underlying mechanisms. Subsequently, SEM/TEM were employed to examine the deformed microstructures at different creep strains. The discussion will encompass the impact of the coherent interface between the matrix and precipitates. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, High-Temperature Materials |