Table 2.

Modified form of measures suggested for improved machinability [37].

S.No.	Theoretical Approach	Experimental Realization
Modification of the process
1	Reduction of chemical reaction rate between the tool and workpiece	Cryogenic turning [79]
2	Reduction of contact time between tool and workpiece	Vibration-assisted cutting [68,69,73,80,81,82,83,84,85,86]
3	Lowering of temperature rise and chemical contact	Usage of appropriate coolant [87,88]
Modification of the cutting tool
4	Building a diffusion barrier on the cutting tool	Use of protective coatings [89]
5	Modifying the cutting tool geometry	Providing nanogrooves on the cutting tool
6	Use of alternative cutting tool material	Use of cBN
Workpiece modification
7	Surface layer modification of the workpiece prior to cutting	Ion implantation
8	Surface defect machining	Pre-drilled laser holes in the workpiece reduce the shear strength, which is evident by observing a lower shear plane angle [90,91,92]