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Magnesium alloy has the characteristics of low density, high specific strength and large elastic modulus, and is widely used in electronic communication, transportation, aerospace, and other fields [1][2][3] . However, compared with other cast alloys, thermomechanical properties and heat resistance of conventional cast magnesium alloy are lower, which limit the industrial application of magnesium alloy [4,5] . Some researchers have studied the effect of the quasicrystal phase on the mechanical