Al-Li

Lithium (Li) is an important alloying element to some 8000 series (Al-Li based) and 2000 series (Al‑Cu‑Li‑based) of aluminum alloys. In this example using the TCS Al-based Alloy Database (TCAL), the AL1LI2 stable phase is included in the equilibrium phase diagram (Figure 1) and the L12-type metastable precipitate Al3Li (named as AL3X, X=Er, Li, Sc, Ti, Zr) is modeled.

Calculated Al-Li phase diagram.

Figure 1: Calculated Al-Li phase diagram [1989Sau; 2012/2017Che].

Calculated (Al) solvi in the Al-Li system in comparison with the data from Fujikawa [1986].

Figure 2: Calculated (Al) solvi in the Al-Li system (references from Figure 1) in comparison with the data from [1986Fuj].

References

[1986Fuj] S. Fujikawa, Solvuses of delta’ phase (Al3Li) and delta phase (AlLi) in Al-Li alloys. J. Japan Inst. Light Met. 36, 771–777 (1986).

[1989Sau] N. Saunders, Calculated stable and metastable phase equilibria in Al-Li-Zr alloys. Zeitschrift fur Met. 80, 894–903 (1989).

[2012/2017Che] H.-L. Chen, Modeling of the AlLi2 and Al3Li phases in the Al-Li binary system, unpublished work, 2012/2017.