Comparative RSM analysis of CO2 laser and abrasive waterjet machining on Armox 500 T armored steel

This study employs response surface methodology (RSM) to model and analyze the effects of abrasive waterjet (AWJ) and CO₂ laser cutting on the surface roughness of ARMOX 500 T armor-grade steel (7.6 mm thick). A comprehensive investigation was conducted to evaluate the influence of key AWJ process parameters, including cutting speed, water jet pressure, stand-off distance, and abrasive flow rate. Similarly, for CO₂ laser cutting, the effects of laser power, assist gas pressure, focus plane location, and cutting speed were examined. Analysis of variance (ANOVA) and process capability statistical techniques were utilized to assess the significance and reliability of the results. The findings indicate that CO₂ laser cutting achieves a lower surface roughness compared to AWJ, suggesting its superior capability for applications requiring high-quality surface finishes. These insights contribute to optimizing cutting processes for high-strength steel components, enhancing efficiency and precision in industrial applications.