Formation of material structures with improved properties by laser irradiation using diffractive optics

Abstract

The problems of improving the aggregate physical and mechanical properties of materials constitute one of the most relevant areas of research in order to further address important practical tasks in a wide spectrum of industrial development areas. Through targeted modification of the materials' structure, it is possible to control their strength, hardness and elasticity, increase resistance to corrosion and reduce the amount of energy required for friction. Laser treatment is used to carry out such advanced modification techniques. The feasibility of using diffractive elements of computer optics for redistribution of laser irradiation intensity in the focal plane, which largely determines the course of structurization processes in the processed materials, is shown. A predetermined spatial profile of the intensity in a specified area of the material surface can be achieved only with the use of appropriate optical systems that ensure the required temperature effect.