The maximum cavitation wear rate of the LTPN UNS S30403 was 5.5 g/m2h, 180 times greater than the one measured for the duplex treated UNS S31803 steel.
Optimum process parameters to achieve the desired EDM efficiency, less tool wear rate, maximum metal removal rate (MRR), circularity while machining Si3N4-TiN composite material can be obtained by utilizing the results derived through this experiment.
The maximum values of specific wear rate observed at the lowest sliding speeds applied decrease significantly with the elevation of the sliding speed for all tribo-pairs, especially for coated specimens.
With an increasing wear rate the maximum temperature decreases.
Considering optimized condition offered by analysis of variance (ANOVA), maximum density (5.314 g/cmaximumximum hardness (786 HV), maximum compression strength (97.76 MPa) and minimum specific wear rate (0.0251 mm3/Nm) of FeNi Al2O3 nanocomposites were obtained.
The analysis was performed for various collision angles, velocities and particle concentrations and, it was found that the shear impact energy of particles with the plate was maximized at collision angles near 30° where the wear rate had its maximum value.
Furthermore, the low Young's modulus of this alloy also plays an important role to reduce the maximum contact pressure and therefore reduce the wear rate.
Optimized combinations of process parameters- voltage, duty factor and electrolyte concentration are obtained for responses- maximum Material Removal Rate (MRR), minimum Tool Wear Rate (TWR) and Radial Over Cut (ROC) are obtained using main effect plots.
The C/C multilayer coatings can withstand the maximum contact stress of ∼3.65 GPa with low wear rate.
