Thermodynamic Database for Nickel-Based Superalloys
– Thermodynamic database (TH), Mobility database (MB), and Molar volume (MV) database for multi-component nickel alloys.
- The PanNi_TH thermodynamic database consists of 26 components, 278 phases and 188 fully assessed binary and ternary systems. The database is validated by many Ni-based superalloys.
- The PanNi_MB mobility database assessed mobility model parameters for the Liquid, Bcc, Fcc, and Hcp solution phases. It is compatible with PanNi_TH and suitable for the simulation of diffusion controlled phenomena of multi-component nickel alloys.
- The PanNi_MV molar volume database covers all the 278 phases assessed in PanNi_TH, and can be combined with the thermodynamic database for the simulation of thermo-physical properties of Ni-based alloys, such as density, thermal expansion, and solidification shrinkage.
Comparison between the calculated and measured liquidus and solidus temperatures
A comparison between the calculated and measured liquidus and solidus temperatures for nickel-based superalloys.
Comparison between the calculated and experimentally determined activity of Al in the Ni-Al-Pt and Ni-Al-Cr-Pt systems
A comparison between the calculated and experimentally determined activity of Al in the Ni-Al-Pt and Ni-Al-Cr-Pt systems.
By integrating PanNi_MB and PanNi_MV with PanNi_TH, the combined database can be used to simulate diffusion-controlled phenomena and thermo-physical properties of nickel-based superalloys. The example shows the simulation of particle size evolution of co-precipitation of γ’ and γ”. The lower figure shows an example of calculated critical resolved shear stress for a nickel alloy Nimonic 105 using the strength model developed for nickel-based alloys considering particles of multiple particle size groups with weak/strong pair coupling or bowing mechanisms.
Particle evolution of γ’ and γ” co-precipitation in nickel-based superalloy 718
Calculated and experimentally determined critical resolved shear stress for a nickel alloy Nimonic 105