Multicomponent Phase Diagram Examples

This example calculates a multicomponent phase diagram using the DEFINE_MATERIAL command in POLY and the TCFE steel database. The material contains 1.5 %Cr + 0.4 %Mn + 3.5 %Ni + 0.3 %Si and 1 %C (by weight). These conditions and the temperature are set by the DEFINE_MATERIAL command.

After the first equilibrium results, a phase diagram is calculated with one axis variable as temperature and the other as the carbon content.

This uses the TCFE database. A license is required to run the example.

The example calculates an equilibrium with suspended or dormant phases and shows how to avoid Cr-oxide clogging in a continuous casting process.

This uses the TCOX database. A license is required to run the example.

The background of this example is that a manufacturer wanted to increase the Cr content of a material from 18 to 25 weight percent. They then had trouble in the continuous casting of this material because solid Cr2O3 was formed.

Using Thermo‑Calc to calculate the equilibria in the steel/slag system, a simple correction was found: modify the Mn or Si content to decrease the oxygen potential.

In Thermo‑Calc, you can FIX a phase with zero amount to simulate how to avoid forming this phase. You then release one of the conditions, usually one of the compositions, and this composition is determined by the equilibrium calculation.

These commands are of note and used in this example:

This example calculates a paraequilibrium and the T0 temperature in a low alloyed steel.

This uses the TCFE database. A license is required to run the example.

This example calculates the chemical vapor deposition (CVD).

This uses the SSUB database. A license is required to run the example.

These commands are of note and used in this example: