Ultra high-strength Mg–Gd–Y–Zn–Zr alloy sheets processed by large-strain hot rolling and ageing

Effect of cooling rate on the microstructure evolution and mechanical properties of homogenized Mg–Gd–Y–Zn–Zr alloy

“…Mg-based alloys with rare earth (RE) elements addition have attracted a great deal of attention as light structural materials due to their low density, high strength and good creep resistance besides high specific strength and good damping capacities [1][2][3]. It is reported that Mg 97 Zn 1 Y 2 (at%) alloy with high tensile yield strength of 610 MPa and elongation to failure of 5% was successfully produced by rapidly solidified powder metallurgy (RS P/M) [4,5].…”

High cycle fatigue behavior of the forged Mg–7Gd–5Y–1Nd–0.5Zr alloy

“…(multiples of random distribution), which is much lower than that of the rolled Mg alloy sheet containing mass RE element (usually higher than 10 m.r.d.) [9]. Concerning on the (0002) plane pole figure, it contains many comparatively high intensity zones with the peak intensity higher than 2 m.r.d..…”

Development of high-strength, low-cost wrought Mg–2.5mass% Zn alloy through micro-alloying with Ca and La

“…Many attempts have been made to improve mechanical properties of Mg alloys through alloying with an objective of achieving strong precipitation strengthening and grain boundary strengthening during the conventionally thermomechanical process. The most effective ones are the ultra-high-strength wrought Mg-Gd-Y-Zn-Zr alloys, the ultimate tensile strength (UTS) of which is larger than 500 MPa after deformation and aging [2][3][4][5][6]. Drawbacks of these Mg-RE alloys are that the addition of a very large amount of expensive heavy rare earth (RE) elements leads to a very high cost and significant increase of their density, limiting their wide applications.…”