Journal
MATERIALS & DESIGN
Volume 85, Issue -, Pages 342-348Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2015.06.158
Keywords
Shear punch test; Superplasticity; Al alloy; Severe plastic deformation
Categories
Funding
- Iran National Science Foundation (INSF) [92014140]
Ask authors/readers for more resources
Superplastic behavior of fine and ultra fine-grained AA5083 Al alloy was examined using the shear punch test To achieve fine- and ultra fine-grained microstructures, a relatively new severe plastic deformation (SPD) process, namely Double Equal Channel Lateral Extrusion (DECLE) was employed. The strain rate sensitivity indices (in) of samples were evaluated after 1, 2, 4, and 6 passes for shear strain rates in the range of 3 x 10 9 to 3 x 10(-1) s(-1) and temperatures in the range of 573 to 673 K. For microstructural observations, TEM images together with the corresponding SAED patterns were prepared and utilized. A considerable increase in the m-value was observed after the first pass of the operation for all testing temperatures. The best condition for achieving a good superplasticity for the alloy was found to be a single pass DECLE at 673 K in the strain rate range of 10(-2) to 10 s(-1). This process condition resulted in an m-value of 0A3, indicative of a high strain rate superplastic deformation behavior. Further passes of the SPD process did not show any sign of superplasticity until the last pass of the operation, during which the m-value slightly increased, compared with the previous pass. (C) 2015 Elsevier Ltd. All rights reserved
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available