| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Entropy Alloys IX: Alloy Development and Properties
|
| Presentation Title |
Accelerated Design of High-entropy Alloys for Gas-Turbine Blade Components |
| Author(s) |
Baldur Steingrimsson, Joseph Poon, Michael Widom, Anand Kulkarni, Xuesong Fan, Chanho Lee, Chuan Zhang, Michael Kirka, Jaafar El-Awady, Peter K. Liaw |
| On-Site Speaker (Planned) |
Peter K. Liaw |
| Abstract Scope |
The adaptation of high-entropy alloys (HEAs) for stage-one turbine blade applications requires comprehensive understanding and significant optimization for operating in the extreme environment of gas-turbine engines. Currently, stage-one turbine blades cast from nickel-based superalloys have limitations in material properties, capping the combined cycle efficiency (CCE) to ~ 62%. To achieve CCE exceeding 65%, at least a 300oC increase in the combustor-firing temperature is required, putting demanding requirements on existing base alloys. However, the exponentially-large composition space of HEAs poses major challenge, in particular to maintain robust microstructures, high damage tolerance, structural integrity, and environmental resilience at 1,300oC. We present a framework for developing transformative refractory-based HEAs utilizing fundamental data science driven by high-throughput calculations and experimentation. We seek to rapidly identify and develop suitable refractory-based HEAs and necessary material-processing science through utilization of Integrated Computational Materials Engineering (ICME). Several promising HEA candidates with potential strengthening mechanisms are identified for exploration. |
| Proceedings Inclusion? |
Planned: |