Abstract
Friction stir processing (FSP) is a novel metal processing technique which is used for improving the material properties locally through significant grain refinement and homogenization. In FSP, processing parameter, namely, tool rotational speed plays an important role in producing a defect-free processed zone and enhancing the properties. In this work, FSP of ZE41 magnesium alloy was conducted at different tool rotational speeds (450, 650, 850, 1050, and 1250 rpm) with constant tool traversing speed of 50 mm/min. It is observed that FSP of magnesium alloy at rotational speed of 650 rpm produced superior mechanical properties as compared to other rotational speeds. This is mainly due to the optimum heat input conditions, grain refinement, and favorable distribution of second phase particles throughout the processed zone.
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