| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
J-54: Microstructure, Mechanical Properties, and Long-term Stability of FeMnNiAlCr High Entropy Alloys for Concentrated Solar Power Systems |
| Author(s) |
Edwin S. Jiang, Xiaoxue Gao, Andrew Pike, Ian Baker, Jifeng Liu, Geoffroy T. F. Hautier |
| On-Site Speaker (Planned) |
Edwin S. Jiang |
| Abstract Scope |
Concentrated solar power (CSP) offers advantages in cost-effective energy storage on harvesting solar energy and the capability to provide electricity when the sun is absent. However, currently-employed tubing materials cannot work at temperatures exceeding 873 K due to mechanical, corrosion, and oxidation limitations, which restrict the conversion efficiency. High entropy alloys (HEAs) are being considered to solve the challenge due to their novel mechanical properties at high temperatures. In this study, we present microstructural characterization, tensile strength, and creep properties of FeMnNiAlCr high entropy alloys, with different Mn content (x = 32.9 – 42 at. %) at temperatures of 873-1023 K. The effect of recrystallization on the microstructures and mechanical properties were also studied. Both as-cast and recrystallized alloys exhibit high strength, good creep resistance, and long-term stability at high temperature. In-situ deformation experiments were conducted in the transmission electron microscope to examine the deformation mechanisms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, High-Temperature Materials, Mechanical Properties |