Tribology investigation of high speed steel onto aluminium alloy AL319 applying nano-coolant
Abstract
In this study, SiO2/Gear oil nano-coolant with varying volume concentrations was employed in the tribological process using a tribometer for machining aluminium AL319 using the smeared technique. The primary objective was to determine the wear rate and coefficient of friction of high-speed steel onto aluminium alloy AL319 by applying SiO2/gear oil nano EDM dielectric. Load, duration, and nano concentration are varied, while spindle speed is kept constant. The stability of the hybrid nano-coolant was confirmed through factorial and response surface methods, showing stability for up to 21 days. The performance of SiO2/Gear oil nano-coolant with the smeared technique succeeded. The optimal inclusion level was determined through the RSM outcome, with 0.10% of SiO2/Gear oil nano-coolant exhibiting the best performance in terms of wear rate and coefficient of friction. The lowest wear rate is 1.6842x10-8 m3/Nm with 400 grams of load, 30 minutes of duration, and 0.10% of nano concentration whereas the highest wear rate value is 6.13296842x10-8 m3/Nm with 1200 gram of load, 90 minutes of duration and 0% of nano concentration. The same parameter goes with the lowest and highest coefficient of friction values which is 0.9241 and 0.9661.