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S. Murzin, N. Kazanskiy, C. Stiglbrunner:
"Development of technologies of laser material processing with use of diffractive optics";
in: "2021 International Conference on Information Technology and Nanotechnology (ITNT)", herausgegeben von: IEEE; IEEE, 2021, 6 S.

Possibilities of using diffractive optics in the laser material processing in the aerospace industry were showed. The applied of diffractive optics for shaping of a laser beam made it possible to obtain the specified properties of the treated materials. On the basis of the application of methods for solving the inverse heat conduction problem, an improvement in temperature field parameters in chromium-nickel-molybdenum steel during laser heat treatment was achieved. Good quality and uniformity in the processing depth across the width of the heat-affected zone and the absence of defects into the material were accomplished. A method for laser annealing of sheet aluminium-magnesium and low-alloy titanium alloys has been developed. The use of this method has made it possible to open up opportunities for expanding the forming capabilities of these materials and improving the precision of aircraft engine parts. A possibility of improving the operational properties of composite materials containing a sealing coating of aluminium-boron nitride and an intermetallic coating of a nickel-aluminium alloy as a sublayer was shown. An increase in the adhesion strength of gas turbine engine parts became possible due to laser processing using diffractive optics. It was shown that the application of pulsed laser welding with a redistribution of density of beam power and energy makes it possible to increase the strength of the welded joint of the nickel-based superalloy.

laser processing; diffractive optics

http://dx.doi.org/10.1109/ITNT52450.2021.9649136

Projektleitung Gerhard Liedl:
DP-Stahl