EFFECT OF TOOL GEOMETRY OF FRICTION STIR WELDING ON MECHANICAL PROPERTIES OF AA-7075 ALUMINUM ALLOY

In this research experiments an attempt has been made to analyze the result of mechanical properties as well as studying the effect of welding parameters like welding speed, pin diameter and shoulder diameter for friction stir welding (FSW). FSW is the most suitable methods for welding on aluminum alloy material AA7075- T6. The mechanical properties like bending strength and tensile strength of weld join is increasing with rotational speed and decreasing at constant transverse feed. The results indicated that tensile strength and micro hardness is increasing at shoulder diameter of 20 mm (ratio 1:4) and at 1320 rpm with a feeding round of 40 mm/min.