Optimization of Microhole Morphology in Electrolytic Abrasive Jet Machining
DOI:
https://doi.org/10.63313/AJET.9019Keywords:
Nanosecond laser, Laser drilling, Nickel-based alloy, Abrasive jet, Inconel 718Abstract
To address issues such as thick recast layers, high pore wall roughness, and dif-ficult-to-control geometric accuracy during micro-hole machining of nick-el-based high-temperature alloy 718, a laser-electrochemical hybrid processing method assisted by abrasive jet is proposed. By establishing a synergistic “electrolyte abrasive jet-nanosecond laser” processing system, combined with multiphysics coupling simulation and experimentation, this study system-atically investigates the influence mechanisms of parameters such as jet veloci-ty, jet angle, abrasive particle size, and voltage on microhole roundness, taper, wall roughness, surface morphology, and recast layer formation. Results indi-cate that moderate jet and electrical parameters significantly enhance orifice morphology and wall quality while effectively suppressing microcracks and re-cast layers. Orthogonal experiments optimized the following optimal process parameters: jet velocity 8 m/s, jet angle 60°, abrasive particle size 15 μm, voltage 15 V, and current 3 A. Under these parameters, the micro-hole round-ness, surface morphology, and taper achieved optimal values, while hole wall roughness was significantly reduced and surface quality markedly improved.
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