Wear and friction properties of AA 7075-T6 with × wt% of WC surface composite fabricated by FSP technique

Abstract

The surface composites were prepared with Aluminium Alloy (AA) 7075-T6 by incorporating 0, 3, 6 and 9 wt% of tungsten carbide (WC) nano particles of 20 nm via Friction Stir Processing (FSP) technique under most noteworthy fixed parametric condition. The main impartial of proposed exertion is to enhance the surface composites behavior towards by attaining better resistant to wear and friction. Also, there was a drastic improvement in composites surface than base material and also higher weight percentage addition samples due to resistance occurred by plastic deformation while indenting. The main aim of this research is to perform wear and friction test by using dry sliding tribometer under room temperature environment by varying load and sliding velocity condition for composite surface stir zone with applied load of 10, 20, 30 and 40 N. The sliding velocities for the test being 1, 3 and 5 m/s respectively for which the responses like wear rate, co-efficient of friction was recorded. Increase in load and sliding velocity increases the wear rate and co-efficient of friction linearly in all the composite surface stir zone samples. Lower wear rate and co-efficient of friction was observed for 9 wt% WC nano particles reinforced stir zone samples. The presence of hard WC nano particles further reduced the grain size in the matrix stir zone which resisted the plastic flow of debris. The FSP-ed surface composites were recommended for replacing sliding components in automobiles, aerospace and marine applications.