Bainite Property Model Settings

The Bainite Property Model, available with the Property Model Calculator and the Steel Model Library, describes the thermodynamics and isothermal kinetics of bainite transformation from austenite. In this Model, bainite is modeled as ferrite or a ferrite-cementite mixture.

Considered elements: Fe, C, Mn, Si, Cr, Ni, Mo. Other elements in the system are neglected for bainite by mass percent.

For the Ferrite, Bainite, and Pearlite Property Models, it is also useful to review the Recommended Composition Ranges for Steel Models.

About the Bainite Property Model

For an example, see PM_Fe_05: Fe-C-Mn-Si-Ni-Cr-Mo Bainite.

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

These settings are found on the Property Model Calculator when Bainite 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.

Select an option from the Austenite composition from list:

  • Nominal composition uses the system composition as austenite composition.
  • Equilibrium composition at austenizing temperature. Select to enter an Austenitizing temperature. The austenite composition is determined from an equilibrium calculation at the austenitizing temperature (if austenite is stable). This option is useful when austenite coexists with other phase(s), e.g. primary carbide, before the transformation(s) being calculated starts. But the Model only considers the effect of other phase(s) on austenite composition.

This setting is available when Equilibrium composition at austenitizing temperature is selected from the Austenite composition from list.

Enter an Austentizing 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.

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.

These plot quantities are available:

  • Temperature
  • Start time (2% bainite)
  • Half time (50% bainite)
  • Finish time (98% bainite)
  • Bainite start temperature
  • Lengthening rate [m/s]
  • Cementite fraction in bainite
  • Retained austenite fraction