Influence of aging on damping of the magnesium–aluminium–zinc series

Discontinuous and continuous precipitation in magnesium–aluminium type alloys

“…The microstructure of as-cast Mg-Al alloys is generally characterized by: a solid solution of aluminium in magnesium (an ␣-Mg phase with a hexagonal close-packed structure) and an ␣ + ␥ eutectic (fully or partially divorced depending on its solidification rate) [5][6][7][8][9][10]. The ␥-phase (called also ␤-phase [11][12][13][14][15]) is an intermetallic compound with a stoichiometric composition of Mg 17 Al 12 (at 43.95 wt.% Al) and an ␣-Mn type cubic unit cell. In comparison with binary Mg-Al alloys, new phases do not appear in commercial ternary alloys with zinc (like AZ91) when the Al to Zn ratio is larger than 3:1 [13][14].…”

Amplitude Dependent Internal Friction in a Mg-Al-Zn Alloy Studied after Thermal and Mechanical Treatment

“…AZ31 magnesium alloy is in the focus of design engineers. Data concerning the ADIF of magnesium alloys of the AZ series were reported in a number of papers [14][15][16][17][18]. Authors tried to find the link between damping behaviour and the alloy's microstructure and its changes.…”

Internal friction associated with the microstructural changes in an AZ91 magnesium alloy

“…On the other hand the connection between microstructure changes and physical quantities such as electrical resistivity, internal friction or positron annihilation can be used. Research of precipitation on damping characteristics has been studied in several studies [4][5][6]. Precipitation exhibits different effects on internal friction of the alloys and the correlation between internal friction and precipitation has been considered to be quite complex [7].…”