The invention belongs to the technical field of
metal materials, and particularly relates to a
laser semi-
solid processing preparation method of a high-strength high-
toughness metal material, the high-strength high-
toughness metal material, and application thereof. The preparation method comprises the steps of (1) hot-cladding a three-dimensional (3D) forming metal piece layer by layer through a first beam of continuous
laser, and acquiring the temperature of a cladding layer in real time; (2) when the temperature of the cladding layer is reduced to be within a semi-
solid state area formed bya primary
solid phase, carrying out mechanical disturbance on the semi-solid-state cladding layer through a
shock wave effect of a second beam of short-pulse
laser; and (3) circularly acting on the cladding layer layer by layer, and then cooling naturally until 3D forming a dual-scale / multi-scale
composite structure metal component. According to the laser semi-solid
processing preparation method of the high-strength high-
toughness metal material, the high-strength high-toughness metal material, and the application thereof provided by the invention, the metal material with novel composite microstructures such as dual-scale / multi-scale structures of nano-grain, ultra-
fine grain and
fine grain and an excellent combination property is obtained, and can be widely applied to the fields such as high speed railway, space flight and
aviation, military industry and instruments and apparatus, and the effective control on macroscopical deformation and
cracking problems of metal pieces is realized.