| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advancing Current and State-of-the-Art Application of Ni- and Co-based Superalloys
|
| Presentation Title |
On the Effects of Chemistry Variations in New Nickel-based Superalloys for Industrial Gas Turbine Applications |
| Author(s) |
Sabin Sulzer, Hideyuki Murakami, Roger Reed |
| On-Site Speaker (Planned) |
Sabin Sulzer |
| Abstract Scope |
Alloys-By-Design (ABD) multi-scale modelling methods have been successfully applied in the past to the design of new superalloys for turbine blades and discs. However, since key input parameters are derived from thermodynamic CALPHAD calculations, the reliability of ABD predictions will depend on commercial parameter databases. This is especially critical for new regions of the alloy design space, such as the one considered here. A set of trial nickel-based superalloys for industrial gas turbine (IGT) blades is investigated, with carefully designed chemistries which isolate the influence of individual additions. Results from an extensive experimental characterization campaign covering SEM, EPMA, EDX, APT, and DSC analyses are compared to CALPHAD predictions and with Monte Carlo simulations for the spatial and temporal evolution of atomic arrangements. Insights gained from this study are used to derive guidelines for optimized IGT alloy design and to gauge the reliability of CALPHAD techniques. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |