Abstract
This work focuses on FSP by reinforcing W nanoparticles with an AA7055 matrix material using a groove-less, single, double, and multi-grooves strategy with reinforcement under ideal parametric conditions. Without any intermetallic formations observed in the XRD and EDS analyses of the samples, the microstructural and SEM analyses of the double and triple groove samples exhibited a homogeneous distribution of W nanoparticles leading to superior grain refinement with interfacial bonding without any volume loss. EBSD analysis of triple groove sample revealed an excellent reduction in ultra-fine grain size up to 4.2 mu m +/- 0.7 mu m. A higher hardness of 241VHN and tensile strength of 736 MPa were observed in the triple groove samples broke at the TMAZ with enhanced ductility. In addition, the fractographic surfaces revealed good dimples and W nanoparticle presence in the matrix. The wear rate and COF were observed as the load and sliding velocity varied. Adhesive wear was observed in groove-less samples, and abrasive wear mode with less delamination and pitting was identified in triple grooved samples. These samples are recommended to replace automotive and aeronautical functional components.