Low temperature enhanced ductility of friction stir processed 5083 aluminum alloy

Bulletin of materials science

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

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

关键词: AA5083;    friction stir processing;    ductility;    superplasticity.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

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, �? of 0.45 for a grain size of 0.95 𝜇m, suggests the operation of superplastic deformation under these present experimental conditions.

【 授权许可】

Unknown