PM_Fe_01: Fe-Cr-C Martensite with Intercritical Annealing

The example uses the Property Model Calculator with the Martensite Fractions and Martensite Temperatures Models to calculate martensite fractions and martensite temperatures [martensite start (Ms) and 90% transformation temperature (M90)].

The alloy is first intercritically annealed and then quenched. Austenite composition is determined by an equilibrium calculation at the annealing temperature. Martensite fraction is calculated as a function of temperature which the alloy is quenched to. The example also shows how Cr content in the alloy influences Ms and M90 after intercritical annealing.

Property Model Calculator, About the Martensite Temperatures Property Model, and About the Martensite Fractions Property Model

  • Folder: Property Models → Steel
  • File name: PM_Fe_01_Fe-Cr-C_martensite_intercritical_annealing.tcu

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.

Visualizations

This example is included as a Property Model tutorial on our website and as part of the Property Model Calculator playlist on our YouTube channel.

Open the example project file to review the node setup on the Project window and the associated settings on the Configuration window for each node. For some types of projects, you can also adjust settings on the Plot Renderer Configuration window to preview results before performing the simulation. Click Perform Tree to generate plots and tables to see the results on the Visualizations window.

PM_Fe_01 Plot: Transformation curves

Figure 1: The transformation curves plot showing Fe-Cr-C martensite with intercritical annealing.

PM_Fe_01 Plot: Transformation curves showing Fe-Cr-C martensite with intercritical annealing.

Figure 2: Comparing Martensite start (Ms) to Martensite finish (Mf).

Reference

[1949Har] W. J. Harris, M. Cohen, Stabilization Of The Austenite-Martensite Transformation. Trans. AIME. 180, 447–470 (1949).