TTNI8: ThermoTech Ni-based Superalloys Database
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Database name (acronym): |
TT Ni-based Superalloys Database (TTNI) |
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Database owner: |
ThermoTech |
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Database version: |
8.0 |
TTNI8 is suitable for commercial Ni-based superalloys, high Fe-containing and single crystal Ni-based superalloys.
Included Elements (23)
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Al |
B |
C |
Co |
Cr |
Cu |
Fe |
Hf |
Mn |
Mo |
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N |
Nb |
Ni |
O |
Pt |
Re |
Ru |
Si |
Ta |
Ti |
|
V |
W |
Zr |
Included Phases
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A4B_D1 |
GAMMA_PRIME |
M2SIO4 |
MU_PHASE |
PT2AL_H |
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BCC_A2 |
GAS:G |
M3B |
MULLITE |
PT2AL_L |
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CR3NI5SI2 |
GRAPHITE |
M3B2_TETR |
NI2M |
PT3AL |
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CR3X_A15 |
HCP_A3 |
M3O4 |
NI3SI_H |
PT5AL3 |
|
CR5B3 |
L10 |
M6C |
NI5M |
PTAL |
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DELTA |
LAVES |
M7C3 |
NI5SI2 |
R_PHASE |
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DELTA_PRIME |
LIQUID |
MB_ORTH |
NI7M2 |
SIGMA |
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DICTRA_FCC_A1 |
M23C6 |
MB2_C32 |
NIAL |
SIO2 |
|
ETA |
M2B_ORTH |
MC |
NIMO |
SPINEL_AB2O4 |
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FCC_A1 |
M2B_TETR |
MN |
P_PHASE |
Z_PHASE |
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G_PHASE |
M2O3 |
MO_B2 |
PI_PHASE |
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Assessed Systems
All phases have been critically assessed and treated by some appropriate thermodynamic models (e.g. the Sublattice Model for solid solutions and liquid mixture phases, the Ideal Gas Model for gas mixture phase, etc), which are applicable over a wide temperature-pressure-composition range. TTNI8 includes work about Pt containing alloys. Extensive assessments on oxides based around the Ni-Al-Cr-Fe-Si-Ti-O system have been done.
Validation
During validation process of the TTNI8 database, extensive comparison has been made between the simulated results and available experimental data for superalloys. The database can be used for predictions of all types of equilibria, such as γ/γ', γ' solvus, solidus/liquidus relations.
Using the SCHEIL module in Thermo‑Calc, it is also possible to make solidification simulations that provide predictions for non-equilibrium micro-segregation, like fs vs T plots and heat evolution. For more complex modeling, the calculations provide critical information that can otherwise only be found by expensive experimental techniques.
Limits
As in the spirit of the CALPHAD method, predictions can be made for multicomponent systems by extrapolation into multicomponent space of data critically evaluated and assessed based on binary, ternary and in some cases higher order systems. However, critical calculations must always be verified by equilibrium experimental data; it is the user's responsibility to verify the calculations but Thermo‑Calc Software AB is interested to know about any significant deviations in order to improve any future release.