The main objective of this work is to assess the performance of graphene nanoplatelets–based cutting fluid in minimum quantity lubrication grinding of Inconel 718. Nanocutting fluids with varying concentrations and different specific surface areas of graphene nanoplatelets were developed, and basic properties like viscosity and thermal conductivity were evaluated at different temperatures. The role of graphene nanoplatelets concentration and specific surface area is investigated by comparing force generated during grinding, surface roughness, grinding temperature, grinding coefficient and specific grinding energy. The experimental results show that graphene nanoplatelets significantly lower the grinding force, temperature, specific grinding energy and roughness of the finished surface. Nanocutting fluid with 0.3 wt% graphene nanoplatelets and 750 mm2/g was found effectively improved the surface quality of the Inconel 718 compared to dry grinding and minimum quantity lubrication grinding with soluble oil.
The main focus of this work is to improve the mechanical, wear and fatigue behaviours of polyoxymethylene (POM) by reinforcing with carbon nanotubes (CNTs). To improve compatibility between CNTs and POM, the surface of the CNTs was modified by various methods of functionalization like carboxylation, silanation, carbonylation and amination. The functionalized CNTs were characterized by Fourier transform infrared spectroscopy to confirm the different functional groups attached to the surface. POM/CNT nanocomposites were developed with functionalized CNTs in different concentrations varying from 0.25 to 2 wt%. Nanocomposites with 1 wt% of silanated CNTs resulted in maximum improvement of tensile, flexural and impact properties. Furthermore, experimental results on fatigue and dry sliding wear tests revealed that the fatigue strength, specific wear rate and friction coefficient are sensitive to functionalization and concentration of CNTs.
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