Comparison of SiO2 nanofluid and conventional coolant for flood cooling in CNC turning of INCONEL 800 to improve surface finish and machining rate

Abstract

Increasing the material removal rate in CNC Turning of Inconel 800 with a novel application of Silicon dioxide (SiO2) nanofluid in flood cooling instead of conventional coolant is the aim of this experimental study. The control group's samples are machined with conventional coolant and the intervention group's samples are machined with Silicon dioxide (SiO2) nanofluid. The 4 % Silicon dioxide (SiO2) Nanopowder concentration and Nanoparticle size less than 5 nm size were preferred. The required minimum total sample size was calculated as 24 (12 + 12). The sample size calculated with the settings of G-Power 0.80 and alpha of 0.05. The near higher Taguchi standard experimental design L16 executed. The material removal rate observed for setting of 32 (16 + 16) different input combinations. The independent key process variables (inputs) included were: cutting speed, rotational speed, its feed rate, Coolant employed and depth of cut. The group's observations were validated and analyzed statistically with SPSS software and found significant (Significant value 0.041 less than 0.05). The output of the proposed method is analysed with ANOVA and also ranked the independent variables based on their influence in the objective. The input parameters optimized (local solution). Mathematical model developed to predict the response of MRR with respect to input levels (global solution). Within the limitations of this study, material removal rate was significantly improved with use of SiO2 Nanofluid in wet machining. That is, SiO2 Nanofluid improved 45.05 % of material removal rate in CNC Turning of INCONEL 800 than conventional coolant.