Formation of periodic structures on the surface of 12Cr18Ni10Tі steel under irradiation with ultrashort laser pulses

Peculiarities of structure formation of surface layers on 12Cr18N10Ti steel under the action of femtosecond laser irradiation were investigated. The effect of the scanning speed of the laser beam on the formation of surface microrelief and possible phase transformations was evaluated. The formation of a peculiar microrelief of the surface can be explained by the complex effect of laser irradiation, which intensifies the redistribution of alloying elements of steel in the surface layers, changing their elemental composition in some places, initiates deformational phase transformations, promotes fragmentation and grinding of the microstructure.