Abstract
Monel 400 alloy exhibits properties like high hardness, strength and toughness, and excellent resistance to corrosion. So, this alloy is especially used in defence, marine, power and chemical processing sectors. However, the cutting of this alloy generates high heat and reactivity with tool due to its inherent properties, which decreased the life of cutting tool and further deteriorated the surface integrity of the machined components. In general, any cutting operation surface quality of work material is very important.The present work assesses impact of tool (uncoated and PVD-TiAlN coated) on surface roughness parameters during dry turning of Monel 400 alloy. The cutting velocity, Vc (m/min) of 69 and 114, a feed rate, f (mm/rev) of 0.122 and cutting depth, t, (mm) of 1 was used to turned the samples. The cutting length of 25 mm was carried out per experiment. It was observed that the turning of Monel 400 with uncoated insert, with an increase in cutting length from the start to the end of cutting roughness values increased. A lowest average surface roughness value of 0.667 µm was observed during turning of Monel 400 with PVD-TiAlN coated insert with the current cutting conditions (114 m/min, 0.122 mm/rev and 1 mm). It reported that the significant reduction in surface roughness parameters were obtained with PVD-TiAlN coated insert over uncoated insert.
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