Surface Reinforcement on Aluminium Matrix by Hybrid Nanocomposites via FSP: A Review

Aluminium hybrid composites are identified as new generation of metal matrix composites for its good strength to weight ratio and good corrosion resistance properties. However their mechanical properties and tribological properties are still lower than that of commonly applied materials. Hence it is necessary to improve the surface qualities of aluminium matrix and makes it suitable for engineering applications. Friction stir processing (FSP) is an emerging technique which can be used to make surface composites. While FSP of different alloys has been considerably reviewed, surface reinforcement by hybrid nanocomposites on aluminium matrix have not been wholesomely reviewed. The present review offers a comprehensive understanding of friction stir processed aluminium matrix hybrid nanocomposites. The available literature provide the details about the effect of process parameters, reinforcement particles, microstructural evolution during the fabrication of aluminium matrix hybrid nanosurface composites. Few research gaps in fabrication of aluminium matrix surface composites has been revealed in this review such as micro alloying with low melting point metals, defect free composites and interrelationship between process parameters.