Improved machinability of TiB2–TiC ceramic composites via laser-induced oxidation assisted micro-milling

Low manufacturing efficiency, poor processing controllability and deteriorated surface quality were main challenges in micro-milling high hardness TiB2-based ceramic composites. This research work investigated an innovative hybrid machining method named laser-induced oxidation assisted (LOMM) of TiB2–TiC composites with 20 ± 0.7 GPa. Oxidation mechanism the material under laser irradiation was studied. At single pulse energy 0.275 mJ scanning speed 1 mm/s, irradiated oxygen-rich atmosphere produced metamorphic layer including loose porous oxide-layer as well dense sub-layer 9.6 In addition, compositions formed oxides anatase TiO2 rutile TiO2, which can be easily removed extremely low cutting force. For range milling parameters, force machined studied LOMM A significant reduction (more than 70%) during removing obtained, compared to that sub-layer. Besides, a well-machined obtained (ap = 2 μm fz 0.5 μm/z) ductile removal mode, roughness is 146 nm. As case study, microgroove having width 0.4 mm aspect ratio 2.5 fabricated successfully using LOMM. comparison, identical parameters conventional (CONM) performed. The results indicated perpendicularity sidewall by superior those CONM. Machining efficiency also improved significantly 106% LOMM, It confirmed process efficient effective machine