Magnesium alloys examined in this study were obtained by a casting method. Metal powders used for the process were purchased from Sigma Aldrich. Components were mixed in a Balzers VSG 02 single-chamber vacuum induction melting furnace and heated at a temperature of 650°C, and a pressure of 600 Torr (8 × 10 4 Pa) in the argon atmosphere. The target elemental composition of the alloys was the AZ31 alloy with the addition of 4, 8, or 12 wt.% of Li. These alloys are further referred to in the text as AZ31-xLi (x = 4, 8, 12). Obtained alloys were cut into samples with sizes ca. 20 mm × 20 mm × 5 mm. Before experiments, the samples were mechanically ground up to P2500 grit emery paper in 99.9% ethanol. After grinding, the samples were ultrasonically cleaned for 5 min in a Skymen JP-008 bath.