Study of machinability performance of Hastelloy-X for nanofluids, dry with coated tools
K. Venkatesan, S. Devendiran, K Nishanth Purusotham, V. Praveen
Abstract
Hastelloy X (Hast-X) is used as a critical component in industries of aerospace, chemical, gas turbine, and marine owing to its excellent properties. Minimum quantity lubrication (MQL) found has a suggestive technique for difficult-to-cut materials. However, no work was reported on Hast-X using MQL. The study examines the comparativ e analysis between dry and MQL in machinability attributes of Hast-X with Physical vapor deposition (PVD:TiAlN) as well as chemical vapor deposition (CVD:TiCN/Al2O3/TiN) coated tool. Hexagonal Boron Nitride(hBN) nanoparticles with 0.25 wt. % and 0.50 wt. % in coconut oil are taken as nanofluids. The results reveal that the 0.25 wt.% with MQL PVD showed the improvement in turning force (5%, 18%), roughness (40%, 4%), wear at tooltip (37.5%, 9%), shear angle by (2%, 2.63%), coefficient of friction by (32%,40%) and chick thickness ration by (3.5%, 1%) that of MQL CVD and dry PVD. Lack of adhesion of chip as well as control of wear abrasion at the tool and uniform saw-like dagger development with the absence of crack are the principal reason for machining attributes improvement that other conditions. The outcomes reveal 0.25 wt.% hBN coconut oil with PVD provides an eco-friendly metalworking fluid for machining to other difficult-to-cut materials.