Liquid and Solidus Temperature Property Model Settings

Liquidus and solidus temperature is a Property Model available when using the Property Model Calculator in Thermo‑Calc. It calculates the equilibrium solidification range in terms of temperature. If only the liquidus temperature is required, the calculation times are reduced.

Configuration Settings

The settings are found on the Property Model Calculator when Liquidus and solidus temperature is selected under General Models.

When working in the Configuration window, click the Description tab for more information about the Model.

For the details about the Condition Definitions, Calculation Type, Timeout in minutes, Parallel Calculation, and other calculation associated settings, see Property Model Calculator: Configuration Window Settings.

Select the Only calculate liquidus temperature checkbox as required. When selected, this improves the calculation speed but the solidus is not calculated.

Choose the Liquid phase of the system. This is a fallback choice. Normally this should be handled automatically, even if multiple liquid phases are present.

Enter an Upper temperature search limit to calculate for a temperature above liquidus for any of the considered compositions. This needs to be in the fully liquid state.

Enter a Max. number of iterations, which is the maximum number of phase transformation iterations performed. The default is 10.

Select the Global minimization for liquidus and/or Global minimization for solidus checkboxes to find all phases present in the equilibria.

Selecting one or both checkboxes can significantly slow down the calculations but ultimately it produces more reliable results.

Global minimization recommendation: First try to calculate without global minimization, then if inaccuracies occur, switch global minimization on. Problems mostly occur if many phases are present at a given temperature.

Select the Suspend gas phase checkbox as required. The occurrence of a gas phase may mislead the liquidus temperature determination. If the presence of the gas phase is absolutely required, you can activate it and then choose a user-defined phase.

Choose a Gas phase from the list.

Select the Print results in Event Log checkbox to display/include all results in the Event Log window. This includes the First solidified phase, Liquidus (K), Solidus (K), and Composition information. Choose the Output type: Single row or Full list for each iteration.

Plot Renderer Settings

Plot Renderer and Plot Renderer: Configuration Settings

When setting up your calculation on the Plot Renderer and/or Table Renderer, the following axis variables are available for the conditions defined on the Property Model Calculator.

When selecting quantities on the Plot Renderer or Table Renderer, the quantity names include an abbreviated name for the Property Model it is associated to. This is useful in particular when you are calculating two or more Property Models that share names for the quantities. The short name identifying the specific Property Model is included in parentheses after the name of the quantity. Below are the full and abbreviated names for each Property Model.

For a list of the abbreviations associated to a Property Model, see Result Quantities: Property Model Abbreviations.

Select from these plot quantities:

  • Composition
  • Temperature
  • Liquidus temperature
  • Solidus temperature