The invention relates to a light-weight high-strength and high-
toughness magnesium-
lithium alloy, a preparation method and application of the light-weight high-strength and high-
toughness magnesium-
lithium alloy in preparation of horseshoes, the light-weight high-strength and high-
toughness magnesium-
lithium alloy is prepared from the following raw materials in percentage by
mass: 5-13% of Li, 0.5-3.5% of Al, 0-1.5% of Y and the balance of Mg and inevitable impurities, and the total amount of the impurities accounts for less than or equal to 0.1% of the alloy. On the basis of a traditional Mg-Li
binary alloy, the
Al element is introduced to form AlLi and Mg2Al3 phases, the
Al element and the Al2Y phase induced by the Y element are cooperated, multi-phase synergistic strengthening is achieved, the synergistic breakthrough that the tensile strength is larger than or equal to 350 MPa and the elongation is larger than 20% is achieved while the density is ultralow, and compared with a traditional Mg-Li alloy, the strength of the alloy is improved by 50% or above, and the weight reduction effect is remarkable; through a spontaneous twin
crystal mechanism in an alpha + beta double-phase region alloy,
dislocation proliferation induced by groove rolling is combined, the damping performance (Q1 value) of the alloy is greatly improved, the damping potential of a horseshoe made of the alloy is far better than that of a traditional aluminum product, the joint
impact load during horse movement can be remarkably reduced, and the protection effect is achieved.