The invention discloses a method for improving obdurability matching of
titanium alloy by inducing an FCC phase through high-temperature
impact deformation, and belongs to the technical field of
metal material
phase change regulation and control. The method comprises the steps that after annealing treatment and surface treatment are conducted on a substrate material, the substrate material is sequentially covered with a sacrificial layer and a restraint layer and evenly pressed, the substrate material is placed on a heating table of a high-temperature
impact deformation device to be preheated, and the substrate material is subjected to high-temperature
impact deformation; according to the method, the energy required for transformation of the HCP phase to the FCC phase is reduced, the
heating temperature and
laser shock parameters are set, the HCP phase is induced to be transformed into the FCC phase under the
dynamic stress-temperature synergistic effect through multi-pass
laser shock
peening and high-temperature and high-speed shock deformation, the FCC phase, nano twin crystals and
residual compressive stress form the synergistic
peening effect, and therefore the HCP phase is converted into the FCC phase. Further, the grain refinement process is accelerated, the strength and
plasticity matching is improved, and the high-temperature impact deformation induces the FCC phase to improve the strength and
toughness matching of the
titanium alloy; the substrate is made of industrial pure
titanium or
titanium alloy. The method is suitable for high-strength parts with complex geometrical shapes, is more widely applicable than traditional rolling annealing, and provides reference for strengthening and
toughening of
titanium alloy.