TCMG8 Thermophysical Properties

This section summarizes the available properties in the TCS Mg-based Alloys Database (TCMG).

• In total, 168 binary systems have viscosity parameters.
• 178 binary systems have surface tension parameters.
• Interactions have been either assessed or estimated for every binary combination in the common solution phases, including liquid, FCC_A1, BCC_A2 and HCP_A3.

Model Descriptions

For model descriptions, see:

• Molar Volume Model
• Electrical Resistivity Model
• Thermal Conductivity Model
• Electrical Conductivity for Ionic Liquid Model
• Surface Tension of Metallic Liquid Alloys Model
• Viscosity of the Metallic Liquids Model

Thermophysical Parameters and Variables

Below is a summary of the available thermophysical parameters and variables for the databases when working in Thermo‑Calc. There are differences when you are working in Console Mode versus Graphical Mode as well as if you use an SDK such as TC‑Python or TC-Toolbox for MATLAB®.

Property (and Graphical Mode Variable Name)	Model Parameters	Variables to Show or Plot in Console Mode or the SDKs (TC‑Python, or TC-Toolbox for MATLAB®)***
Molar volume	V0, VA	VM for a system VM(PHI) for phase PHI
Electrical conductivity	ELQ**	ELCD for a system ELCD(PHI) for phase PHI
Electrical resistivity	ELRS, ESPD	ELRS for a system ELRS(PHI) for a phase PHI
Thermal conductivity	THCD	THCD for a system THCD(PHI) for phase PHI
Thermal resistivity		THRS for a system THRS(PHI) for phase PHI
Thermal diffusivity		THDF for a system THDF(PHI) for phase PHI
Surface tension	SIGM, XI*	SURF(LIQUID) SURF(ION)**
Dynamic viscosity	VISC	DVIS(LIQUID) DVIS(ION)**
Kinematic viscosity		KVIS(LIQUID) KVIS(ION)**
* XI is not used in the TCOX database (all versions). As of 2023b it is also not used starting with the following versions of these databases: TCFE13, TCNI12.1, TCTI5.1, TCNOBL3, TCPMAG2, and TCCU6. As of 2024a, TCMG7, TCAL9, and TCHEA7. As of 2024b, TCSLD5. ** ION is used in the TCS Metal Oxide Solutions Database (TCOX) *** The examples listed for the SDKs are using Console Mode syntax. The quantities can also be accessed in both ThermodynamicQuantity and ScheilQuantity classes. See the various model descriptions or the SDK help for details.

Examples

For examples using this database, see:

• Surface Tension: Al-Mg, Al-Zn, and Al-Mg-Zn
• Viscosity: Al-Mg and Al-Mg-Zn and Viscosity of AZ91D and AZ31 Alloys
• Electrical Resistivity of Mg-Ag and Mg-Ce
• Thermal Conductivity of Mg-Gd, Mg-Y, and Mg-Gd-Y

For surface tension, viscosity, and molar volume general use examples, see T_11: Surface Tension in Cu-Zr, T_12: Viscosity in Cr-Ni, and T_15: Molar Volume and Thermal Expansion Coefficients for L12-type Al3Sc and Al3Zr Compounds (Graphical Mode) and Thermophysical Properties Examples (Console Mode)

For electrical resistivity and thermal conductivity general use examples, see T_16: Electrical Resistivity and Thermal Conductivity for Pure Copper (Graphical Mode) and Thermophysical Properties Examples (Console Mode)