The primary goal of this study was to compare the cutting performance of novel linear- groove-textured carbide tool inserts (CNGA 120408) with untextured tool inserts (CNGA 120408) in CNC turning of S32750 super duplex stainless steel to reduce flank wear under nano Minimum Quantity Lubrication (nMQL). Surface texturing is an appealing green manufacturing approach that supports sustainable production by changing the surface texture of the cutting tool at the rake face and increasing the wettability of the cutting fluid at the cutting edge. A linear groove texture pattern was engraved on the tool surface using Laser Surface Texturing (LST). A Jobber XL CNC turner was used for turning operations on S32750 super duplex stainless steel with novel textured tool inserts and was compared to untextured tool inserts in terms of cutting performance criterion flank wear. The sample size was computed using a G-power of 80% and alpha value of 0.005. There were two groups, the experimental and control groups, with a total sample size of 40. The experimental results show flank wear of 0.245 mm for single-textured tools and 0.282 mm for untextured tools in turning S32750 super duplex stainless steel rods. The independent t-test results for the CNC turning process with textured and untextured tools under nMQL machining conditions are statistically significant with a p value (2-tailed) of 0.001 (p < 0.05). Within the constraints of the investigation, the suggested tool inserts with linear groove texturing demonstrated a noteworthy reduction in flank wear, amounting to 16.45%, compared to the untextured carbide tool inserts.

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