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Laser surface modification of materials

Kapidakis Sarantos

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Summary

Nowadays, due to the rapid development of science, there is intense interest in the field of materials science, in which new innovative methods that can improve the surface properties of materials are constantly being sought. Undoubtedly, the effect of the laser on the surfaces of materials is a particularly attractive method since, as will be analyzed in this thesis, it includes a wide range of processing methods with significant advantages. In particular, lasers have the ability to precisely deliver large amounts of energy to specific areas of a material in order to achieve the desired response. This energy is absorbed near the surface of the materials, thereby modifying the surface chemistry and local microstructure. In this thesis, the basic principles of laser interaction with matter and the different types of lasers are initially mentioned. In the second part, the methods of modifying the surface of some types of materials are examined in relation to their interaction with lasers, while possible applications are presented. Finally, in the third part of the work, laser applications are presented for the treatment of the surface of a series of materials such as cast iron, steel and titanium, as well as the case of laser use to combat the phenomenon of corrosion from cavitation.

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