Precipitation process and effect on mechanical properties of Mg–9Gd–3Y–0.6Zn–0.5Zr alloy

Enhanced mechanical properties of Mg–Gd–Y–Zr casting via friction stir processing

“…[32], it was reported that the precipitation sequence at 250 • C for the Mg-Gd-Y-Zr could be described as: super-saturated solid solution (S.S.S.S.) → ␤ (D019) → ␤ (cbco) → ␤ 1 (fcc) → ␤ (fcc), while the ␤ and ␤ phases could coexist at peak aging status [33]. In the present study, the 13 h aging at 225 • C was close to the peak aging status [1,3,15], leading to the coexistence of the ␤ and ␤ phases.…”

Mechanical Properties of Magnesium-Rare Earth Alloy Systems: A Review

“…Freeney et al [97] reported the effects of Friction stir processing and ageing on the grain refinement and breakage and dissolution of second phase particles that resulted in the increase in the strength of the aged alloy. Yang et al [98] attributed the high strength of the GWZ930 (Mg-9Gd-3Y-0.5Zn-0.5Zr) alloy mainly to precipitation strengthening and slightly to grain boundary strengthening. Al-Samman et al [99] investigated sheet texture modification in ZEK100 alloys containing rare earths Ce, Nd, La, Gd and Ce rich Misch metal and reported that the Gd containing alloy has the highest tensile ductility of 30% and a very low tensile yield strength.…”

Solid solution strengthening behaviors in binary Mg–Y single phase alloys

“…The value k = 300 MPa m 1/2 (280-320 MPa m 1/2 for Mg [17]) will be used for the following analysis. To isolate the effect of solid solution hardening, the data from Fig.…”