| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Alloy Phase Transformations at Elevated Temperatures
|
| Presentation Title |
Develop Precipitation-Strengthened Refractory High Entropy Alloys for Turbine Blades Applications above 1300 Degree Celsius |
| Author(s) |
Michael C. Gao, David E. Alman, Chantal K. Sudbrack, Paul Jablonski, Vishnu Raghuraman, Mike Widom, Michael Kirka |
| On-Site Speaker (Planned) |
Michael C. Gao |
| Abstract Scope |
Improving the efficiency and decreasing CO2 emissions of aviation and land-based turbines will require increasing the temperature of the turbine operations. However, this increase is limited by the current state-of-the-art Ni-base superalloys. Thus, there is a need to develop next-generation refractory alloys for high-temperature service. The main challenge in developing these alloys is balancing room temperature ductility and fracture toughness with high temperature strength and creep resistance, while maintaining comparable oxidation resistance and densities to Ni-base superalloys. This project integrates multi-scale computational modeling with additive manufacturing (AM) and performance evaluation to rapidly design an AM processable, precipitation strengthened refractory high entropy alloy for use at 1300C and above. Presented will be high throughput CALPHAD and first-principles calculations used to rapidly design the alloy. Also presented will be the microstructure and mechanical properties in the as-cast and annealed conditions, and surrogate additive manufacturing (melt track) experiments of these alloys. |