Viscosity: Al-Mg and Al-Mg-Zn

The viscosity thermophysical property data is included with the TCS Mg-based Alloys Database (TCMG) starting with version 6 (TCMG6).

Al-Mg

The viscosity of the Al-Mg system has been extensively studied. There are discrepancies between the measurements of different studies. Based on the higher-order systems, it was decided to use the experimental data from [1959Geb; 2012Li; 2018Gan]. The following diagram shows the dynamic viscosity of the liquid Al-Mg at 973 K.

Calculated iso-viscosity plot of the Al-Mg liquid at 973 K.

Figure 1: Calculated iso-viscosity plot of the Al-Mg liquid at 973 K.

Al-Mg-Zn

The viscosity of Al-Mg-Zn ternary alloys with charge crucible method was measured in [2018Gan].  Yakymovych [2013Yak] used oscillation cup viscometer for their measurements on viscosity of AL-Mg-Zn alloys. This plot shows the calculated viscosity of two ternary alloys along with the experimental data from these references.

Calculated viscosity of two Al-Mg-Zn liquid alloys.

Figure 2: Calculated viscosity of two Al-Mg-Zn liquid alloys.

References

[1959Geb] K. Gebhardt E; Detering, Über die Eigenschaften metallischer Schmelzen: XVI. Die innere Reibung eutektischer Aluminiumlegierungen. Zeitschrift für Met., 379–385 (1959).

[2012Li]  P. Li, G. Mi, A. Okhapkin, N. Y. Konstantinova, A. Sabirzianov, P. S. Popel, Micro-mechanism for the evolution of viscosity versus temperature in magnesium-aluminum alloy melts. Procedia Eng. 27, 871–879 (2012).

[2013Yak] A. Yakymovych, Y. Plevachuk, V. Sklyarchuk, “Influence of Zn and Al additions on viscosity of liquid Mg” in Magnesium Technology 2013 (Montreal, Canada, 2013), pp. 1600–1605.

[2018Gan] T. Gancarz, J. Jourdan, W. Gasior, H. Henein, Physicochemical properties of Al, Al-Mg and Al-Mg-Zn alloys. J. Mol. Liq. 249, 470–476 (2018).