Experimental investigation on Machinability performance of Carbon nanotubes coated tool During turning of titanium alloy

Abstract

The usage of a significant amount of cutting fluids is unavoidable when machining more challenging materials. Traditionally, hard materials are turned in conjunction with grinding, which increases time and costs to the production process. Alternatively, hard turning with dry cutting conditions reduces lubrication expenses and eliminates the need for grinding, resulting in a shorter production time. Dry turning is generally accomplished without the use of coolant, which lowers manufacturing costs and gives ecological benefits. But in dry and hard machining, a major issue in the machining community is extensive tool wear at high temperatures during extreme cutting conditions. Cutting tools that machine low-machinability materials with improved wear performance and tool life have been a major focus of the cutting tool industries in recent years. This new Carbon Nanotubes (CNT) coating is intended to fill the gap between difficult-to-machine materials and dry machining. newlineThis study highlights the machining performances of High-Speed Steel (HSS) deposited with CNT using Chemical Vapour Deposition (CVD) methodology concerning the main machinability characteristics such as cutting forces, cutting point temperature, tool wear and tool life. To assure homogenised deposition of CNT, microstructural studies using a Raman spectroscopy and Scanning Electron Microscope (SEM) were carried out. The coating adherence with the substrate material was also validated by a scratch test. Dry turning experiments with three distinct cutting conditions were performed with titanium grade 5 alloy (Ti6Al4V). Additionally, the morphology of metal chips was studied in this experiment newline newline newline