Severe plastic deformation of 6061 aluminum alloy tube with pre and post heat treatments

In this work, the 6061 aluminum alloy tubes are severely deformed through a novel method called Tube Channel Pressing (TCP). The ability of this process in improving mechanical properties, grain refinement and microstructural changes of the alloy with different heat treatments before and after TCP p...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2013-02, Vol.563, p.60-67
Main Authors: Farshidi, M.H., Kazeminezhad, M., Miyamoto, H.
Format: Article
Language:English
Subjects:
6061
Aging
Aging (artificial)
Aluminum base alloys
Channels
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Defects and impurities in crystals
microstructure
Exact sciences and technology
Grain and twin boundaries
Grain boundaries
Grain refinement
Heat treatment
Materials science
Mechanical properties
Microstructure
Other heat and thermomechanical treatments
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Precipitation
Severe plastic deformation
Solid solution, precipitation, and dispersion hardening
aging
Structure of solids and liquids
crystallography
Treatment of materials and its effects on microstructure and properties
Tube
Tubes
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Summary:In this work, the 6061 aluminum alloy tubes are severely deformed through a novel method called Tube Channel Pressing (TCP). The ability of this process in improving mechanical properties, grain refinement and microstructural changes of the alloy with different heat treatments before and after TCP process is investigated. Results show that TCP has notable effect on grain refinement and decreases crystallite size of solid solution treated aluminum 6061 material to 52nm after equivalent strain of 3.09 which is comparable with the measured data from other SPD processes. The strength of the specimens aged before TCP is higher than that of those aged after TCP. The specimens artificially aged after TCP show more sharp grain boundaries than those of others and lower dislocation density in grain interiors. Also, aging before TCP leads to finer precipitations than those formed in aging after TCP.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2012.11.025