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Journal ArticleDOI

On grinding force ratio, specific energy, G-ratio and residual stress in SQCL assisted grinding using aerosol of MWCNT nanofluid

13 Apr 2021-Machining Science and Technology (Informa UK Limited)-pp 1-15

Abstract: In the present investigation, water based multi-walled carbon nanotube (MWCNT) dispersed nanofluid was produced and used as a cutting fluid in small quantity cooling lubrication (SQCL) assisted gri...
Topics: Grinding (60%), Nanofluid (59%), Cutting fluid (54%), Specific energy (52%), Lubrication (52%)
Citations
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Journal ArticleDOI
Zhao Zhengcai1, Ning Qian1, Yucan Fu1Institutions (1)
Abstract: Coolants play an important role in controlling thermal damage in high-efficiency deep grinding (HEDG). The cooling condition in the grinding contact zone (GCZ) determines the cooling effect during ...

References
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Journal ArticleDOI
Abstract: We have produced nanotube-in-oil suspensions and measured their effective thermal conductivity. The measured thermal conductivity is anomalously greater than theoretical predictions and is nonlinear with nanotube loadings. The anomalous phenomena show the fundamental limits of conventional heat conduction models for solid/liquid suspensions. We have suggested physical concepts for understanding the anomalous thermal behavior of nanotube suspensions. In comparison with other nanostructured materials dispersed in fluids, the nanotubes provide the highest thermal conductivity enhancement, opening the door to a wide range of nanotube applications.

2,301 citations


Journal ArticleDOI
Abstract: The enhancement of the thermal conductivity of water in the presence of carbon-multiwall nanotubes (C-MWNT) was investigated. Sodium dodecyl sulfate (SDS) was employed as the dispersant, and a 0.6 vol% suspension of C-MWNT in water was used in all measurements. The thermal conductivity was measured with a transient hot-wire instrument built for this purpose, and operated with a standard uncertainty better than 2 The maximum thermal conductivity enhancement obtained was 38 %. In an attempt to explain the experimental observations, a number of micro-structural investigations have been carried out and those results are presented here along with the analysis.

324 citations


"On grinding force ratio, specific e..." refers background in this paper

  • ...A substantial improvement in grinding performance under SQCL environment in terms of reduced force level, surface roughness and improved wheel life has been documented in the literature (Sadeghi et al., 2009; Tawakoli et al., 2010; Barczak and Batako 2012)....

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Journal ArticleDOI
Abstract: In metal industries, the use of cutting fluid has become more problematic in terms of both employee health and environmental pollution. But the use of cutting fluid generally causes economy of tools and it becomes easier to keep tight tolerances and to maintain workpiece surface properties without damages. Because of them some alternatives has been sought to minimize or even avoid the use of cutting fluid in machining operations. Some of these alternatives are dry machining and machining with minimum quantity of lubrication (MQL). This paper deals with experimental investigations in the role of MQL on cutting temperature, chip formation and product quality in turning AISI-1040 steel at different industrial speed-feed combinations by uncoated carbide insert. The results have been compared with dry machining and machining with soluble oil as coolant. The experimental results indicate that such MQL enables substantial reduction in the cutting temperature, dimensional inaccuracy depending upon the levels of the cutting velocity and feed rate. It was also noted that the chip formation and chip–tool interaction become more favorable under MQL condition. Therefore, it appears that MQL, if properly employed, not only provides environment friendliness but can also improve the machinability characteristics.

295 citations


Journal ArticleDOI
Yujin Hwang1, Ho-Yeol Park1, Jaekeun Lee1, W.H. Jung2Institutions (2)
Abstract: Nanofluid is a kind of new engineering material consisting of nanometer-sized particles dispersed in base fluid. In this study, various nanoparticles, such as multi-walled carbon nanotube (MWCNT), fullerene, copper oxide, silicon dioxide and silver, are used to produce nanofluids for enhancing thermal conductivity and lubrication. As base fluids, DI water, ethylene glycol, oil, silicon oil and poly-α-olefin oil (PAO) are used. To investigate the thermo-physical properties of nanofluids, thermal conductivity and kinematic viscosity are measured. Stability estimation of nanofluid is conducted with UV–vis spectrophotometer. Also, the extreme pressure of nanofluids has been measured with FALEX EP tester. Thermal conductivity of nanofluid increases with increasing particle volume fraction except water-based fullerene nanofluid which has lower thermal conductivity than base fluid due to its lower thermal conductivity, 0.4 W/mK. In addition of fullerene in oil, the extreme pressure of nanofluids increases up to 225%. Stability of nanofluid is influenced by the characteristics between base fluid and suspended nanoparticles.

290 citations


Journal ArticleDOI
Abstract: The wetting and spreading behavior of pure liquids over solid surfaces changes if liquids contain nanosized spherical particles or surfactant micelles, globular proteins and macromolecules. Recent studies on the spreading of nanofluids have demonstrated the inadequacy of well-known concepts of the spreading and adhesion of pure liquids on solid surfaces in understanding nanofluid spreading behavior. This paper reviews the progress made in the wetting and spreading of nanofluids over solid surfaces with an emphasis on the complex interactions between the particles in the nanofluid and with the solid substrate, as well as the spreading of thin nanofluid films containing nanoparticles on hydrophilic surfaces driven by the structural disjoining pressure gradient. The spreading droplet advances as a series of distinct nanoparticle layers.

220 citations


"On grinding force ratio, specific e..." refers background in this paper

  • ...In addition, reduction of friction due to adsorption of particles on the solid surface (Vafaei et al., 2006; Sefiane et al., 2008; Wasan et al., 2011) might have played a favorable role in wetting....

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