Phase-field modeling of changes in the grain structure of 316L steel obtained by cold spraying followed by laser treatment

The work is devoted to the study of the grain structure of alloy 316L, obtained by supersonic laser deposition. The purpose of this paper is to study the formation of the grain structure of the metal obtained by cold spraying method and treated by laser. Recrystallization processes are simulated using the phase field method. The effect of a concentrated energy source on the grain structure of the metal was described by the non-stationary Allen-Kahn and Kahn-Hilliard equations. The simulation results showed that during the thermal action of the laser, the grains diffused and increased in size. The regularity of grain growth in the direction of the current temperature gradient was also found. The simulation results were confirmed by the results of several experiments conducted to verify them.