Investigations of the Effects of Different types of Cooling conditions in Friction stir Process on the Mechanical properties of AAAluminum 7075

Friction stir process (FSP) is a solid state process in which many parameters play important roles. Al 7075 is one of the strongestalloys. In this paper the effect of the traverse,rotational speed on the mechanical properties of Al 7075 are investigated insubmerged,ambient conditions. The friction stir process is done with a threaded pin. The pin diameter, pin length,diameterof the shoulder were 8, 5,18 mm respectively. The experimental results showed that the normal,submerged friction stirprocess with optimum parameters can increase strength,elongation of Al7075. In the submerged,normal friction stir processtensile strength,elongation were increased 14.85, 128.57, 11.71,138.1 percent respectively. In most of the specimens Vickersmicro hardness was increased regard to base metal. The submerged friction stir process generally showed better results than thenormal friction stir process. In submerged friction stir process the maximum temperature was reduced about the 60 percent incomparison of the normal friction stir process.