Experimental Study on Laser Pulse Delay Machining of IN718 Assisted by Chemical Liquid
DOI:
https://doi.org/10.63313/AJET.9017Keywords:
Back-jet Processing, pulse-delay modulation, Chemical-Assisted Laser Machining, Microhole MorphologyAbstract
IN718, a typical nickel-based superalloy, is widely used in critical components such as aero-engine turbine blades and combustion chambers due to its excel-lent high-temperature strength, creep resistance, and corrosion resistance. However, the material's high-temperature strength deficiency, low thermal conductivity, and poor plasticity lead to low efficiency in conventional ma-chining processes and severe tool wear. Laser machining, with its advantages of high energy density, non-contact processing, and flexibility, is regarded as an effective method for machining micro-holes in superalloys. Nevertheless, laser micro-hole machining in ambient air still faces challenges such as oversized hole diameters, rough hole walls, wide heat-affected zones, and thick oxide layers. To address these issues, this study proposes the use of a chemical-assisted machin-ing environment combined with a pulse delay technique, aiming to thoroughly investigate its mechanism and effectiveness in the micro-hole machining of IN718 alloy.
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