▎ 摘　　要

NOVELTY - A high-performance magnesium alloy material comprises 5-8 wt.% graphene material, 1-2 wt.% cobalt (Co), 1-2 wt.% yttrium (Y), 4-7 wt.% aluminum (Al), 1-3 wt.% manganese (Mn), 0.2-0.8 wt.% lithium (Li), 0.2-1.0 wt.% zirconium (Zr), 0.1-0.5 wt.% calcium (Ca), 0.1- 0.5 wt.% zinc (Zn), 0.2-1.0 wt.% cadmium (Cd), 0.3-0.7 wt.% ytterbium (Yb), 0.3-0.7 wt.% nickel (Ni), 0.1-1 wt.% antimony (Sb), 0.1-1 wt.% molybdenum (Mo), and balanced magnesium (Mg). USE - High-performance magnesium alloy material. ADVANTAGE - The alloy material has yield stress reaching more than 400 MPa, tensile strength reaching more than 300 MPa, hardness of 120-140 HV, and density of 1.5-1.6 g/m3. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of the alloy material which comprises preheating pure magnesium metal at 150-230 degrees C. and other metal element-containing raw material, performing heat preservation at 900-950 degrees C under protection of inert gas, and smelting; controlling temperature at 150-180 degrees C, adding graphene material, uniformly stirring, standing, filtering to obtain crude magnesium alloy liquid; and refining crude magnesium alloy liquid, surface processing, cold pressing, and sintering and shaping to obtain product.