Friction stir processing (FSP) is one of the new and promising thermomechanical processing techniques that alters the microstructural and mechanical properties of the material in single pass to achieve maximum performance with low production cost in less time using a simple and inexpensive tool. This Engineering book studies a new techinque of the FSP. Direct friction stir processing new technique (DFSP) with new tool design introduced in this book . DFSP is used to produce composite surface for AA7075-T651 plate thickness 6mm by adding SiC particles. A hollow tool used as a reservoir for powder particles. Through holes on shoulder used as feeding holes of powder. A mechanical pressing system used to help powder inserting process. Improving mechanical properties observed was 206 HV at 1460 rpm rotating speed; 60 mm/min travels speed with particle size 3.5 μm for SiC.
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