Journal
MATERIALS CHARACTERIZATION
Volume 62, Issue 4, Pages 391-397Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2011.01.016
Keywords
Severe plastic deformation; DCAP; Transmission electron microscopy; 6061 Al-alloy; Strip
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Funding
- TUBITAK [105M174]
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Dissimilar Channel Angular Pressing (DCAP) is a severe plastic deformation technique to improve the mechanical properties of flat products by producing ultrafine grains. In this study, the changes in the microstructure and mechanical properties of 6061 Al-alloy strips deformed by various numbers of DCAP passes were investigated. Some DCAPed samples were also held at 200 degrees C and 350 degrees C to investigate the effect of post-annealing. Mechanical properties were determined by hardness and tension tests; and microstructural changes were investigated by TEM analysis. Up to a critical level of plastic strain, remarkable improvements have been observed in the strength and hardness of the severely deformed strips; and the improvements have been explained by variations in grain size, dislocation structure, and formation of subgrains. (C) 2011 Elsevier Inc. All rights reserved.
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