Influence of abrasive water jet parameters on the surface integrity of Inconel 718

Inconel 718 (IN718) is a precipitation hardened nickel-base super-alloy exhibiting high strength and good corrosion resistance at elevated temperatures on the downside; it characterized by poor machinability. Abrasive water jet (AWJ) process offers potential method to machining difficult-to-cut materials such as IN718. The present work investigates influence of AWJ parameters surface roughness, topography, depth cut, residual stress when milling Surface characterization was conducted through 3D optical microscopy SEM techniques. Residual stresses were measured in longitudinal transverse directions with respect path using X-ray diffraction (XRD) technique. obtained results showed that milled surfaces have homogeneous texture embedded abrasive particles roughness. introduced compressive similar order level both (X Y). In addition, observed pressure most influencing parameter roughness whilst traverse speed step-over distance had significant effect stress. Based experimental analysis, an empirical model predict cut proposed. validation proposed has shown around 5% error predicted actual pocket depth.