The invention relates to a
hot working and grain refinement
plasticity modification technology dedicated to high-entropy
alloy material and a method to prepare high-performance high-entropy
alloy material. The invention aims to provide an extruding and mounding composite
plasticity modification method dedicated to the service requirement of high-entropy
alloy. Aiming at the hot-working characteristic of high-entropy alloy, the method of first mounding and then extruding, mounding after extruding and repeated mounding and extruding is adopted, so that the stress state in the high-entropy alloymaterial during the deformation process is effectively controlled, the three-directional
compression stress is increased, generation and expansion of microcracks evoked by
lattice deformation are effectively restrained, the grain is refined, the comprehensive mechanical performance is improved, and effective modification of the high-entropy alloy is realized. The extruding and mounding composite technology is easy to realize and low in cost; high-entropy alloy
ingot blank material with uniform and excellent
structure property can be obtained, and the service capacity is effectively improved; and with adoption of the method, large-scale application of the high-entropy alloy is promoted, and the mechanical performance of the high-entropy alloy can be effectively improved and controlled.