Molar Volumes

The TCS Steel and Fe-alloys Database (TCFE) contains molar volume data for all phases in the database, allowing for the calculation of volume fraction of phases, as well as density and coefficient of thermal expansion using Thermo‑Calc. Molar volumes are also needed when using the Precipitation Module (TC-PRISMA) for precipitation simulations. The figures below show the validation of predicted densities in different alloys and the relative length change of a commercial steel.

Calculated density of several steels at room temperature compared to experimental data

Figure 1: Calculated density of several steels at room temperature compared to experimental data provided by Sandvik [2017San] and Uddeholm Tooling [2017Udd].

Relative length change of steel

Figure 2: Relative length change [2002Gar] of steel Fe-0.11C-0.5Mn-0.03Si-0.01Cr-0.02Ni (wt.%) compared with predictions using the TCFE database.

References

[2002Gar] C. García de Andrés, F. G. Caballero, C. Capdevila, L. F. Álvarez, Application of dilatometric analysis to the study of solid–solid phase transformations in steels, Mater. Charact. 48, 101–111 (2002).

[2017San] Personal Communication with Sandvik.

[2017Udd] Personal Communication with Uddeholm Tooling.