Abstract
To achieve a defect-free butt joint of dissimilar metals by friction stir welding procedure, there are some major parameters, such as tool material and geometry, tool rotational speed, feed rate and tilt angel. This research is focused on dissimilar metals welding, namely 1100 Al alloy and 1045 carbon steel. In this paper, the effect of tool rotation speed and feed rate are experimentally investigated on surface appearance, microstructure and micro hardness of the friction stir welded plates. Optimum values of tool rotation speed and feed rate have been achieved experimentally by the quality of the butt joint.
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