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https://www.ias.ac.in/article/fulltext/boms/034/07/1447-1453

AA5083; friction stir processing; ductility; superplasticity.

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.

Ehab A El-Danaf¹ Magdy M El-Rayes¹ Mahmoud S Soliman¹

1. Mechanical Engineering Department, Centre of Excellence for Research in Engineering Materials (CEREM), College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421

Published

December 2011

Manuscript received

10 April 2010