Among Mg alloys, Mg-Al-Zn-Mn alloys (AZ series), are one of the most widely used Mg alloys. Alloying with Al improves the corrosion resistance and mechanical properties of the alloys with little impact on their density . At the same time, alloying with Zn improves physical characteristics, while alloying with Mn slightly improves the corrosion resistance of these alloys by hindering the cathodic activity of Fe-rich intermetallic particles (IMPs) AlMnFe . In this regard, alloying of AZ-series Mg alloys with Li makes it possible to obtain lightweight alloys with low density (density of ca. 1.3 g/cm 3 ) . The microstructure of binary Li-rich Mg alloys depends on the concentration of Li in the alloys . At low lithium contents (below 5.7 wt.%), the crystal structure of the formed alloys is a hexagonal close-packed (hcp) with the α-phase as a solid solution of lithium in magnesium. At high lithium content (above 11.3 wt.%), the crystal structure is body-centered cubic (bcc) with the β-phase as a solid solution of magnesium in lithium.