Solute Partition Coefficient for Ni-base Alloys

The TCS Ni-based Superalloys Database (TCNI) can be used to show elemental partitioning in Ni-base alloys.

The partitioning coefficient represents the distribution of a solute element between two phases. Having well-predicted partitioning of elements between phases can be important in kinetic calculations, particularly certain Scheil calculations. The partitioning coefficient is calculated as X(phase 1, element) / X(phase 2, element).

Below is an example of calculated partitioning coefficients for Ni-base alloys, between the liquid and gamma phase at the liquidus temperature, compared with data from the literature.

Calculated solute partitioning coefficient between FCC and liquid phase for numerous Ni-base alloys.

Figure 1: Calculated solute partitioning coefficient between FCC and liquid phase for numerous Ni-base alloys.