Abstract
Commercial 5083 Al rolled plates were subjected to friction stir processing (FSP) with two different processing parameters, having 430 and 850 rpm tool rotational speed with a single traverse feed rate of 90 mm/min. These FSP conditions resulted in two fine grained microstructures of 0·95 μm (430 rpm) and 2·6 μm (850 rpm). Tensile elongations were measured at a relatively low temperature of 250°C at three strain rates, and demonstrated that a decrease in grain size resulted in significantly enhanced ductility and lower forming loads. The occurrence of a relatively high value of strain rate sensitivity, m of 0·45 for a grain size of 0·95 μm, suggests the operation of superplastic deformation under these present experimental conditions.
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El-Danaf, E.A., El-Rayes, M.M. & Soliman, M.S. Low temperature enhanced ductility of friction stir processed 5083 aluminum alloy. Bull Mater Sci 34, 1447–1453 (2011). https://doi.org/10.1007/s12034-011-0341-8
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DOI: https://doi.org/10.1007/s12034-011-0341-8