Abstract
The present study is to investigate the role of cryogenic cooling using liquid nitrogen as coolant on the tool wear and surface roughness in turning of Inconel 625 with PVD-TiAlN-coated carbide inserts. The machining parameters of the experimental works were cutting conditions (dry and cryogenic cooling), cutting speeds (43, 71, 118 m/min), feed rate (0.1 mm/rev), and cutting depth (1 mm). The surface roughness (Ra) was significantly improved to a maximum of 50.52% by cryogenic cooling with the current cutting parameters. The scanning electron microscope (SEM) investigation of the used cutting inserts revealed the substantial reduction in tool wear under cryogenic cooling compared to dry turning in all the machining trails undertaken.
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