Martensite Temperatures Property Model Settings

The Martensite Temperatures Property Model, available with the Property Model Calculator and the Steel Model Library, calculates the martensite start (Ms) temperature based on modeling of the transformation barrier. Martensite half and finish temperatures are also given according to the Martensite Fractions Property Model.

About the Martensite Temperatures Property Model

For an example see PM_Fe_01: Fe-Cr-C Martensite with Intercritical Annealing and PM_Fe_02: Fe-Mn Martensite Morphologies.

To run calculations with the Steel Models requires a valid maintenance license plus licenses for both the TCFE (version 9 and newer) and MOBFE (version 4 and newer) databases. Also see our website to learn more about the Steel Model Library and other related examples.

Configuration Settings

The settings are found on the Property Model Calculator when Martensite Temperatures is selected under Steel 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.

Click to select the Intercritical annealing checkbox to assume intercritical annealing. Click to clear the checkbox if the specified composition is used directly. When selected, an equilibrium calculation is performed at the specified temperature and the composition of the austenite phase is used for the martensite temperature calculation.

This setting is available when the Intercritical annealing checkbox is selected.

Enter an Annealing temperature in the field. The unit is the same as that selected under Condition Definitions.

Enter the Grain size of the austenite in micrometers (μm). The default is 100 μm.

In the Parent phase Gibbs energy addition [J/mol] field enter a value in J/mol to add a Gibbs energy offset to the parent austenite phase. This can be used, for example, to correct database offsets. The default is 0 J/mol.

Plot Renderer Settings

Plot Renderer, Plot Renderer: Configuration Settings, and Plot Type: TTT Mode

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.

  • Ms temperature: Martensite start temperature
  • Lath Ms: Martensite start temperature of lath alpha or alpha-prime martensite
  • Plate Ms: Martensite start temperature of plate alpha or alpha-prime martensite
  • Epsilon Ms: Martensite start temperature of epsilon martensite
  • M50: 50% martensite temperature
  • M90: 90% martensite temperature
  • M99: 99% martensite temperature