Abstract
Microstructure and mechanical properties of welded dissimilar materials by Friction Stir Welding (FSW) process depend mainly on several parameters such as tool rotational speed, feed rate, offset, and pin profile. In this study, the microstructure and strength properties of friction stir welded 6061-T6 aluminum alloy to ultra low carbon steel have been investigated using different traverse speeds, rotating speed and tool offset. Microstructures observations have been conducted by optical and scanning electron microscopy. The joint strength was evaluated on a tensile testing machine. X-ray diffraction has revealed the main phase inside the welded joint. The effect of traverse speed on the shear load of a joint has been found. We have found a relationship between microstructures and mechanical properties of welded joint.
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