Development of Aluminium Based Surface Nano Composites Using Friction Stir Processing.

Friction Stir Processing is a relatively new technique which has been developed for microstructural modification of metallic materials through intense, localized plastic deformation. The current research work deals with the development of defect free Aluminium based surface nano composites, with different volume fractions of second phase particles. The work is comprised of development and deformation behavior of aluminium based surface nano composites. Nano-structured second phases of Tungsten and Aluminium oxide were introduced into the Aluminium matrix using a novel unique technique, friction stir processing. Microstructural characterization was done using Scanning Electron Microscopy and Xray Diffraction. Mechanical behavior was evaluated using Vicker's micro hardness. Ultimately structure property correlations were established.