Discontinuous coarsening behavior and kinetics of L1₂ precipitate in high-entropy alloys

Coarsening is a metallurgical process that is related to solute transmission and system energy decrease. However, for the coarsening behavior of the L1₂ precipitate in high-entropy alloys, the influence of moving boundary is still an open question. Here, we found the moving boundary accelerates the discontinuous coarsening of L1₂ phase. The multiple defects-accelerated diffusion and continual particle-capturing ability of the moving boundary provide a high-efficiency solute transport for the fast-coarsening kinetics of L1₂ phase. In addition, a boundary-encountered assisted precipitate formation mechanism is also validated in the recrystallized area.