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首页> 外文期刊>Journal of Manufacturing Processes >Investigating a novel Ag/ZnO based hybrid nanofluid for sustainable machining of inconel 718 under nanofluid based minimum quantity lubrication
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Investigating a novel Ag/ZnO based hybrid nanofluid for sustainable machining of inconel 718 under nanofluid based minimum quantity lubrication

机译：基于纳米流体基于最小量润滑下的纳米流体润滑下的418的可持续加工新型Ag / ZnO杂交纳米流体

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摘要

Sustainable machining, with implementation of eco-friendly dry and minimum quantity lubrication (MQL) methods, has gained attraction of researchers and engineers to solve the environmental and health allied issues caused by bulk usage of the conventional cutting fluids. Nanofluids have recently became more obvious choice as a cutting fluid in MQL applications owing to their superior thermo-physical properties. In this work, a novel hybrid nanofluid, consisting of Ag coated ZnO (Ag/ZnO) nanoparticles in ethylene glycol base, has been proposed as cutting fluid for MQL application. Initially, the Ag/ZnO hybrid nanoparticles were synthesized by a chemical precursor method. Then, synthesized nanoparticles were blended in ethylene glycol at several volume concentrations (phi = 0.05 % to 0.2 %). The nanofluids were characterized for their thermo-physical properties and stability criterion, and then a nanofluid with the best performance was selected for nanofluid based MQL (NFMQL) experiments. The performance of NFMQL was compared with dry, MQL environments during milling of difficult-to-cut Inconel 718 superalloy with PVD coated carbide inserts. Taguchi L9 orthogonal array was incorporated for experimental design to investigate the effect of cutting speed, feed rate and machining environment on the machining performance in terms of the average surface roughness and cutting temperature. Analysis of variance shown that the cutting environment contributed to the average surface roughness and cutting temperature by 24.52 % and 44.74 %, respectively. As compared to dry and MQL condition, the NFMQL improved the surface finish by 23.5 % and 13.07 %, respectively, and reduced the cutting temperature by 15.38 % and 8.56 %, respectively, owing to proposed hybrid nanofluids enhanced lubrication and heat dissipation properties. Furthermore, the field emission scanning electron microscopic (FESEM) images of used cutting tool inserts reveal that the NFMQL condition induces the minimum tool wear as compared with MQL and dry environments. Finally, the multi-response optimization was achieved through the implementation of Taguchi grey relational analysis (TGRA) with the optimum combination of cutting speed of 30 mm/min, feed rate of 0.036 mm/tooth, and NFMQL cutting environment.
机译：可持续加工，随着环保干燥和最小数量润滑（MQL）方法的实现，已经获得了研究人员和工程师的吸引力，以解决传统切削液的批量使用引起的环境和健康盟国问题。由于其优异的热物理性质，纳米流体最近成为MQL应用中的切削液。在这项工作中，已经提出了一种由乙二醇碱中的Ag涂覆的ZnO（Ag / ZnO）纳米颗粒组成的新型杂交纳米流体作为用于MQL施用的切割液。最初，通过化学前体方法合成Ag / ZnO杂化纳米颗粒。然后，在几个体积浓度（PHI = 0.05％至0.2％）中，将合成的纳米颗粒混合在乙二醇中。纳米流体的特征在于它们的热物理性质和稳定性标准，然后选择具有最佳性能的纳米流体用于基于纳米流体的MQL（NFMQL）实验。将NFMQ1的性能与干燥的MQL环境进行比较，在铣削难以切割的Inconel 718超合金中，具有PVD涂层硬质合金。 Taguchi L9正交阵列被纳入实验设计，以研究切割速度，进料速率和加工环境在平均表面粗糙度和切削温度方面对加工性能的影响。方差分析表明，切割环境分别导致平均表面粗糙度和切割温度分别为24.52％和44.74％。与干燥和MQL条件相比，由于提出的杂交纳米流体增强的润滑和散热性能，NFMQL分别将表面光洁度分别改善23.5％和13.07％，并将切削温度降低15.38％和8.56％。此外，使用切削工具插入件的场发射扫描电子显微镜（FeSEM）图像揭示了与MQL和干燥环境相比的NFMQL条件诱导最小刀具磨损。最后，通过实现Taguchi灰色关系分析（TGra）实现多响应优化，其切削速度为30mm / min的最佳组合，进给速度为0.036mm /齿和NFMQL切割环境。

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