PM_Fe_12: Flow Stress 15-5PH Steel

The example uses the Property Model Calculator and the Martensitic Steel Strength model to calculate the flow stress curves for a 15-5PH steel alloy, with samples tempered for 2, 5, and 50 hours. The example shows the use of flow stress with this Property Model.

An Experimental File Reader is used with data from Croné et al. [2022Cro]. Three Property Model Calculators are used with a Flow stress mode of σ vs ϵ and a One Axis calculation is used.

The Tempering time is set for each Property Model Calculator to 2 h, 5 h, and 50 h (the settings themselves are entered in seconds).

Read about the theory in Flow Stress.

  • Folder: Property Models → Steels
  • File name: PM_Fe_12_Flow_Stress_15-5PH_Steel.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.

This example uses TCFE14. Earlier versions of this database can be used although there may be slight differences in the results.

Visualizations

Many of our Graphical Mode examples have video tutorials, which you can access in a variety of ways. When in Thermo‑Calc, from the menu select Help → Video Tutorials, or from the main My Project window, click Video Tutorials. Alternately, you can go to the website or 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.

Figure 1: The calculation plots the True strain [%] to the True stress [MPa] as flow stress curves and compares it to experimental data taken from [2022Cro].

Reference

[2022Cro] P. Croné, T. Zhou, P. Hedström, J. Odqvist, P. Gudmundson, J. Faleskog, Continuum plasticity modelling of work hardening for precipitation-hardened martensitic steel guided by atom probe tomography. Mater. Des. 215, 110463 (2022).