Essential Magnesium Alloys Binary Phase Diagrams and Their Thermochemical Data

Table 3

Optimized model parameters of the Mg-Al system [41].

Phase	Parameters; Δ𝑔^0 and ^0𝐿 in J/mole, ^oΔ𝐻 in J/mole·atom and ^oΔ𝑆 in J/mole·atom·K
	Z^MgMgAl=6,Z^AlAlMg=4
Liquid	Δ𝑔^0MgAl=−4495.5+2.85𝑇; Δ𝑔^10MgAl=436.8+0.42𝑇;
	Δ𝑔^01MgAl=732.5
Mg-hcp	^0𝐿^Mg-hcp=1950.8−2.0𝑇; ^1𝐿^Mg-hcp=1480.6−2.1𝑇;
	^2𝐿^Mg-hcp=3501.5
Al-fcc	^0𝐿^Al-fcc=4973.1−3.5𝑇; ^1𝐿^Al-fcc=900.4+0.42𝑇;
	^2𝐿^Al-fcc=950.4
Al30Mg23 (𝜀)	^oΔ𝐻^Al30Mg23AlMg=−991.8; ^oΔ𝑆^Al30Mg23Al,Mg=3.27
Al140Mg89 (𝛽)	^oΔ𝐻^Al140Mg89AlMg=−1075.0; ^oΔ𝑆^Al140Mg89Al,Mg=2.95
Al12Mg17 (𝛾); (Mg)5(Al, Mg)12(Al, Mg)12	^0𝐿^𝛾Mg:Al:Al,Mg=3901.7−0.50𝑇; ^0𝐿^𝛾Mg:Mg:Al,Mg=3901.7−0.50𝑇