Ternary Phase Diagrams

You can use the TCS Mg-based Alloys Database (TCMG) to plot ternary phase diagrams in Thermo‑Calc. These examples show a selection of the important assessed systems that are the building blocks of the database itself when applying the CALPHAD method.

The CALPHAD Method and the Thermo‑Calc Databases. Also visit the video tutorials on our website or our YouTube playlist.

When working in Thermo‑Calc with ternary diagrams you use either the Ternary Calculator (in Graphical Mode) or the Ternary module (in Console Mode). The fundamental calculation engine is the same but you access the settings in different ways.

Mg-Gd-Zn

Calculated Mg-Gd-Zn phase equilibria at 673 K.

Figure 1: Calculated Mg-Gd-Zn phase equilibria at 673 K [2015aChe].

Al-Li-Mg

Calculated enthalpy of mixing of liquid at 955 K along several compositional lines in the Al-Li-Mg system.

Figure 2: Calculated enthalpy of mixing of liquid at 955 K along several compositional lines in the Al-Li-Mg system [2011Wan].

Calculated vertical section from Mg to Al0.67Li0.33 in the Al-Li-Mg system.

Figure 3: Calculated vertical section from Mg to Al0.67Li0.33 in the Al-Li-Mg system [2011Wan].

Gd-Mg-Nd

Calculated Mg-rich phase equilibria of the Gd-Mg-Nd system at 773 K and 808 K.

Figure 4: Calculated Mg-rich phase equilibria of the Gd-Mg-Nd system at 773 K and 808 K [2011Qi].

Cu-Mg-Y

Calculated Cu-Mg-Y phase equilibria at 673 K.

Figure 5: Calculated Cu-Mg-Y phase equilibria at 673 K [2015cChe].

Cu-In-Mg

Calculated Cu-In-Mg phase equilibria at 673 K.

Figure 6: Calculated Cu-In-Mg phase equilibria at 673 K [2018Che].

Ag-Gd-Mg

Calculated Ag-Gd-Mg liquidus projection

Figure 7: Calculated Ag-Gd-Mg liquidus projection [2015bChe].

References

[2008Cao] H. Cao, C. Zhang, J. Zhu, G. Cao, S. Kou, R. Schmid-Fetzer, Y. A. Chang, Experiments coupled with modeling to establish the Mg-rich phase equilibria of Mg–Al–Ca. Acta Mater. 56, 5245–5254 (2008).

[2011Qi] H.Y. Qi, Thermodynamic assessment of the Gd-Mg-Nd system, unpublished work (with modifications) (2011).

[2011Wan] P. Wang, Y. Du, S. Liu, Thermodynamic optimization of the Li–Mg and Al–Li–Mg systems. Calphad. 35, 523–532 (2011).

[2015aChe] H.-L. Chen, Thermodynamic assessment of the Gd-Mg-Zn and Mg-Y-Zn systems in TCMG4, Thermo‑Calc Software (2015).

[2015bChe] H.-L. Chen, Thermodynamic assessment of the Ag-Gd-Mg system in TCMG4, Thermo‑Calc Software (2015).

[2015cChe] H.-L. Chen, Thermodynamic assessment of the Cu-Mg-Y system in TCMG4, Thermo‑Calc Software (2015).

[2018Che] H.-L. Chen, Thermodynamic assessment of the Cu-In-Mg system in TCMG5, Thermo‑Calc Software (2018).