Multi Responsive Parametric Optimization for the Micromachining of AISI3415 Steel using Femtosecond Laser

Femtosecond laser micromachining of rectangular grooves on AISI3415 steel is investigated at 150 fs pulse duration and at a wavelength of 775nm. In the present work, Laser process parameters such as spot size, feed rate and number of passes are optimized considering the multiple responses such as surface roughness (Ra) and depth of groove based on orthogonal array with grey relational analysis. A grey relational grade is calculated using grey analysis and process parameters are optimized based on signal to noise ratio. To validate the experimental result, verification test is performed. Experimental outcomes have proved that the responses in femtosecond laser micromachining can be enhanced efficiently through this approach.