Effect of machining parameters and cutting edge geometry on surface integrity of high-speed turned Inconel 718

By R. Pawade, S. Joshi, P. Brahmankar. 2008

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Prediction of machining induced residual stresses in turning of titanium and nickel based alloys with experiments and finite element simulations (2012, background): “In addition increase in feed rate makes the residual stresses more tensile at surface and more compressive in the peak compressive de especially at higher cutting speeds, where the peak resid stresses might become less compressive with increasing feed lower cutting speeds [3–5].”
Dry machining of Inconel 718, workpiece surface integrity (2011, positive): “…with the microstructural deformation observed by Sharman et al. (Sharman et al., 2008) Comparable microhardness values and gradients were measured by Pawade et al. (2008) and by Ezugwu and Tang (1995); these measurements confirm the plastic deformation of the surface layer after machining Inconel…”
Influence of Tool Materials on Machinability of Titanium- and Nickel-Based Alloys: A Review (2014, background): “It has been observed in several studies performed on titanium- and nickel-based alloys [50, 54] that high feed rate at lower cutting speed results in increasing tensile nature of residual stresses, whereas peak value of compressive residual stress increased in depth as well.”