|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Late News Poster Session
||J-99: Can the Effective Bond Energy Formalism (EBEF) Improve the CALPHAD Database for Co-based Superalloys?
||Julio Cesar Pereira Dos Santos, Chuan Liu, Sean Griesemer, Peisheng Wang, Ursula R. Kattner, Carelyn E. Campbell
|On-Site Speaker (Planned)
||Julio Cesar Pereira Dos Santos
As part of the CHiMaD/NIST project, a thermodynamic database for γ/γ’ Co-based superalloys composed of 10 elements is being developed. The original version of the database was developed using a traditional CALPHAD approach to describe complex topologically close-packed (TCP) phases such as sigma (σ), Laves (C14, C15 and C36), mu (μ) and chi (χ). However, the results showed the need to improve the description of these phases in some ternary systems constituting the entire database. Therefore, the effective bond energy formalism (EBEF) supported by new density functional theory (DFT) data is being implemented to properly describe these complex TCP phases. Promising preliminary results were obtained. A comparison between results using the classical CALPHAD approach and results using the EBEF is presented for some key ternary systems.
||Copper / Nickel / Cobalt, Other, Other