Effect of process parameters on the laser microdrilling performance of stainless steel, aluminium and copper

Abstract Micromachining techniques are being used regularly in various engineering and production sectors such as Micro Electromechanical Systems, Aerospace, Automotive, Electronics Biomedical industries. For Laser Beam Micromachining, highly energized laser beam is focused on a small region of the workpiece surface. As result, it heated up rapidly to sufficiently high temperatures, then material starts melt and/or vaporize from This phenomenon removal called ablation. The holes that produced by one-dimensional drilling (LBD) can come with defects like taper, heat affected zone (HAZ) Recast Layer. On other hand, LBD process offers control, efficiency, precision, rate, particularly for microscopic variety materials. performance measured different parameters taper recast layer machined holes. Previous studies report many observations regarding input parameters. But thorough study respect properties has not been reported yet. research work this paper focuses experimental investigation materials stainless steel (type SS304), Aluminum Copper observe effects (namely power, scanning speed, pulse repetition rate) LBD. also considers thermophysical well optical thermal conductivity, specific heat, melting point, absorptivity how affects outcome combined manner. Characterization output Entry area, Exit Area done SEM (Scanning Electron Microscope) machine. 75 Loop count, 90% Power, 950 mm/s Scanning Speed 10kHz highest amount observed SS, valued at 0.053 mm 2 . largest taperness found Cu 44.404°. Power identified most significant factors performance.