Mechanical Properties of Aviation Aluminum-Lithium Alloy Samples Obtained by Plasma-Assisted Laser Cutting
V. B. Shulyatyev1, M. A. Gulov1, E. V. Karpov2, A. G. Malikov1, A. A. Filippov1
1Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Lavrent'ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: aluminum alloy, laser cutting, optical discharge, thermal influence zone, mechanical tests, fatigue endurance
Abstract
Results of tensile and low-cycle fatigue testing of samples made of an aluminum-lithium alloy of the Al-Mg-Li system obtained by plasma-assisted laser cutting performed by a pulsed CO2 laser in an argon jet with the laser beam and optical discharge plasma simultaneously affecting the material are reported. Low-cycle fatigue tests show that the number of loading cycles survived by the sample obtained by plasma-assisted laser cutting is more than twice greater than the number of cycles survived by the samples obtained by conventional laser cutting with continuous radiation.
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