Eng – Mec – El Rayes- 03
Title
Friction stir processing: An effective technique to refine grain structure and
enhance ductility
Author-s
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Department
Major
citation
Year of
Publication
Publisher
Sponsor
Type of
Publication
ISSN
El-Danaf, E.A. El-Rayes, M.M., , Soliman, M.S.
URI/DOI
DOI: 10.1016/j.matdes.2009.09.025
Full Text
(Yes,No)
Key words
Yes
Abstract
Commercial 5083 Al rolled plates were subjected to friction stir processing (FSP) with a tool
rotational speed of 430 rpm and a traverse feed rate of 90 mm/min. This treatment resulted
in a fine grained microstructure of 1.6 μm and an average misorientation angle of 24°.
Ductility was measured using tensile elongations at a 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 ductility of the friction stir processed material was
enhanced by a factor ranging from 2.6 to 5 compared to the ductility of the as received
material, in the range of the strain rates tested. The strain rate sensitivity of the processed
material is 0.33 while for the as received, it is 0.018. The deformation mechanism, in the
fine-grained specimens is mainly controlled by solute drag creep, though the contribution of
grain boundary sliding to the deformation process cannot be overlooked. Both mechanisms
led to significant flow localization and simultaneous cavity formation.
edanaf@ksu.edu.sa, melrayes@ksu.edu.sa, solimanm@ksu.edu.sa
Department of Mechanical Engineering
Mechanical Engineering
Materials and Design Volume 31, Issue 3, March 2010, Pages 1231-1236
2010
Elsevier
King Saud University
Journal Article
02613069
Creep (I); Microstructure (F); Plastic behavior (F)