Papers by Rabesh Kumar Singh
During metal cutting operation, cutting fluid plays a vital role by cooling and lubricating the t... more During metal cutting operation, cutting fluid plays a vital role by cooling and lubricating the tool-work piece interface and removing chips from the cutting zone. As a result, a cutting fluid may significantly affect the tribological conditions at these interfaces. However, human health and environment both are affected negatively by the excessive use of conventional cutting fluid. This has led to the development of a new class of cutting fluid with superior thermal and tribological properties to restrict its extravagant use during machining. A colloidal mixture of metallic or non-metallic nano meter sized particles in a base fluid is called nanofluid. For the last one decade, nanofluids have attracted the attention of researchers due to its improved thermal conductivity and heat extraction capability. In the present work, a new nanofluid is prepared by mixing Al 2 O 3 nanoparticles in conventional cutting fluid at different concentrations. The prepared nanofluid is characterized for its thermal conductivity and viscosity at all nanoparticle concentrations. Furthermore, its machining performance is examined in turning workpiece of AISI 1040 steel using minimum quantity lubrication (MQL) technique. The results are also compared with that of dry machining and wet/MQL machining using conventional cutting fluid. The experimental study clearly reveals that performance of Al 2 O 3 nanofluid in terms of surface roughness, tool wear, cutting force and chip morphology is found to be better compared to dry machining, wet machining with conventional cutting fluid and MQL using conventional cutting fluid.
A colloidal mixture of metallic or non-metallic nano meter sized particles in a base fluid is cal... more A colloidal mixture of metallic or non-metallic nano meter sized particles in a base fluid is called nanofluid (NF). In the present work, a nanofluid with superior thermal and tribological properties is developed by mixing TiO 2 nanoparticles in vegetable oilwater emulsion in different concentrations. The developed nanofluid is characterized for its thermal conductivity and viscosity for various nanoparticle concentrations at different temperatures. Furthermore, its machining performance is examined in turning of AISI 1040 steel using minimum quantity lubrication (MQL) technique. The obtained results are also compared with that of dry machining and wet/MQL machining using conventional cutting fluid. The experimental study clearly reveals that performance of TiO 2 nanofluid in terms of surface roughness, tool wear, cutting force and chip morphology is found to be better compared to dry machining, wet/MQL machining with conventional cutting fluid.
Health and environmental concerns about the use of excessive conventional cutting fluids during c... more Health and environmental concerns about the use of excessive conventional cutting fluids during conventional machining has led to the development of a new type of cutting fluid. Inefficient disposal of industrial cutting fluids during wet machining also reduces the use of conventional cutting fluid. Nano-material mixed cutting fluids have shown superior thermal properties and tribological properties. In the present work, different nanofluids are prepared by suspension of Titanium dioxide (TiO2), Silicon oxide (SiO2) and Aluminum oxide (Al2O3) nanoparticles in vegetable oil and water-based emulsion at room temperature in different volumetric concentrations. The viscosity and density of the developed nanofluids are measured at different temperatures for different nanoparticle volumetric concentrations. From the experimental results, it has been found that with the increase of nanoparticle concentration in base fluid, enhanced the its viscosity and density. Furthermore, addition of nanoparticles at 25 ºC enhances viscosity more compared to its addition at higher temperatures. For an increase of concentration from 0.25% to 3%, enhancement in viscosity of Al2O3, SiO2 and TiO2 nanofluids is observed as 41.6%, 43.75% and 35.55%, respectively, while for higher temperatures almost constant improvement of 25%, 24% and 30% is observed for Al2O3, SiO2 and TiO2 nanofluids, respectively. The viscosity and density of three different nanofluids are also compared. Results showed that newly prepared Al2O3 based nanofluid exhibits better properties than TiO2 and SiO2 based nanofluids.
A hybrid nanofluid (NF) with better thermal and tribological properties has been developed in thi... more A hybrid nanofluid (NF) with better thermal and tribological properties has been developed in this investigation by mixing alumina-based nanofluid with graphene nanoplatelets (GnP) in the volumetric concentrations of 0.25, 0.75 and 1.25 vol %. It was noted that an increase of nanoparticle concentration enhances both, the thermal conductivity and viscosity, though the hybrid nanofluid has lower thermal conductivity compare to its constituents and the viscosity lies in between its constituents. The tribological test confirms that the wear decreases with the increase of nanoparticle concentration and the hybrid nanofluid generated least amount of wear. Hybrid nanofluid shows better wettability results as compared to alumina-based nanofluid as well as base fluid. The turning of AISI 304 steel under minimum quantity lubrication (MQL) technique clearly establishes that application of hybrid nanofluid performs better as compared to alumina nanoparticle mixed cutting fluid. The study reveals that blending of GnP with alumina enhances the performance of hybrid nanofluids. The application of hybrid nanofluid with MQL significantly reduces the surface roughness by 20.28% and cutting force, thrust force and feed force by 9.94%, 17.38% and 7.25%, respectively.
Nanofluid (NF) is a colloidal mixture of metallic or non-metallic particles of nanometre-size in ... more Nanofluid (NF) is a colloidal mixture of metallic or non-metallic particles of nanometre-size in a base fluid. In the present investigation, a nano-cutting fluid with better thermal and tribological properties has been developed by adding SiO 2 nanoparticles into a vegetable oil-water emulsion in different volumetric concentrations. The prepared nanofluid is also characterized for its thermal conductivity and viscosity with various nanoparticle concentrations at different temperatures. Furthermore, its performance as a cutting fluid by using minimum quantity lubrication (MQL) technique has been examined in turning of AISI 1040 steel. The investigation results have also been compared with the results obtained by applying dry machining and wet/MQL machining techniques using conventional cutting fluid. The experiment clearly establishes that the performance of SiO 2 nanofluid in terms of cutting force, surface roughness, tool flank wear and chip morphology is better compared to conventional cutting fluids, applied under wet/MQL machining and dry machining.
Minimum quantity lubrication (MQL) has proved to be a sustainable method which can replace flood ... more Minimum quantity lubrication (MQL) has proved to be a sustainable method which can replace flood cooling for the application of cutting fluid in the metal cutting operation. Addition of nanoparticles in the cutting fluid may enhance the cooling and lubricating properties of the base fluid. Present work deals with the experimental investigation of the effect of addition of graphene nanoparticles in the cutting fluid under MQL on machinability characteristics such as tool flank wear, surface roughness and cutting zone temperature. Response surface methodology (RSM) was utilized for the experimental design. The concentration of graphene nanoparticles in the base fluid, cutting velocity, feed rate and depth of cut were taken as cutting parameters. Regression analyses was employed to estimate flank wear, surface roughness and cutting temperature. ANOVA was applied to examine the influence of cutting parameters on cutting temperature, flank wear and surface roughness. Results showed that higher concentration of graphene nanoparticles played a significant role in reducing flank wear of cutting tool even at higher magnitude of cutting velocity and feed rate which has an immense potential of boosting the productivity of machining process. Minimum surface roughness was also obtained at higher concentration of graphene nanoparticles along with higher magnitude of cutting velocity and lower magnitude of feed rate and depth of cut. In case of cutting zone temperature higher concentration of graphene platelets was effective in reducing cutting zone temperature along with lower magnitude of cutting velocity, feed rate and depth of cut. Finally, the optimization of output responses was done in order to provide the ranges for best cutting conditions. Copy Right, IJAR, 2017,. All rights reserved.
Your article is protected by copyright and all rights are held exclusively by The Brazilian Socie... more Your article is protected by copyright and all rights are held exclusively by The Brazilian Society of Mechanical Sciences and Engineering. This e-offprint is for personal use only and shall not be self-archived in electronic repositories. If you wish to selfarchive your article, please use the accepted manuscript version for posting on your own website. You may further deposit the accepted manuscript version in any repository, provided it is only made publicly available 12 months after official publication or later and provided acknowledgement is given to the original source of publication and a link is inserted to the published article on Springer's website. The link must be accompanied by the following text: "The final publication is available at link.springer.com". 1 3 J Braz. Soc. Mech. Sci. Eng.
For improvement of tool life and increasing production cutting fluid are vital for an industry. H... more For improvement of tool life and increasing production cutting fluid are vital for an industry. However, due to various drawbacks a paradigm shift was seen toward dry machining and MQL machining. In present work dry machining and MQL machining of AISI 316 in turning operation are compared on the basis of surface roughness and tool flank wear. Furthermore, the effect of feed, velocity and depth of cut is seen in both the cases to find out the parameter that affects surface roughness and tool flank wear the most. It has been found that both surface roughness and tool flank wear were minimum in MQL machining. With increase in all three parameters the change surface roughness and tool wear is also studied.
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Papers by Rabesh Kumar Singh