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An investigation into the hot deformation characteristics of 7075 aluminum alloy
Research highlights ► Continuous and geometric dynamic recrystallization occurs upon hot compression test. ► Continuous dynamic recrystallization is the main DRX mechanism in 7075 Al alloy. ► At the semi-solid range the liquid made the recrystallized structure to spheroidize. ► During compression the liquid penetrates from the center to the marginal zones.
Abstract The deformation behavior and microstructural evolution of a 7075-T6 aluminum alloy have been investigated through applying hot compression tests at different temperatures and strain rates (450, 500, 520, 550, 580°C and 0.004, 0.04 and 0.4s−1). The peak stress levels in different conditions were extracted from the related true stress–true strain curves. Different dynamic recrystallization (DRX) mechanisms including continuous, discontinuous and geometrical ones were proposed to justify the corresponding results of various thermomechanical processing conditions. Furthermore, the results indicated that the recrystallized structure had been spheroidized in the semi-solid temperature range due to the liquid pressure and their sizes were reduced with increasing the strain rate.
An investigation into the hot deformation characteristics of 7075 aluminum alloy
Research highlights ► Continuous and geometric dynamic recrystallization occurs upon hot compression test. ► Continuous dynamic recrystallization is the main DRX mechanism in 7075 Al alloy. ► At the semi-solid range the liquid made the recrystallized structure to spheroidize. ► During compression the liquid penetrates from the center to the marginal zones.
Abstract The deformation behavior and microstructural evolution of a 7075-T6 aluminum alloy have been investigated through applying hot compression tests at different temperatures and strain rates (450, 500, 520, 550, 580°C and 0.004, 0.04 and 0.4s−1). The peak stress levels in different conditions were extracted from the related true stress–true strain curves. Different dynamic recrystallization (DRX) mechanisms including continuous, discontinuous and geometrical ones were proposed to justify the corresponding results of various thermomechanical processing conditions. Furthermore, the results indicated that the recrystallized structure had been spheroidized in the semi-solid temperature range due to the liquid pressure and their sizes were reduced with increasing the strain rate.
An investigation into the hot deformation characteristics of 7075 aluminum alloy
Rokni, M.R. (author) / Zarei-Hanzaki, A. (author) / Roostaei, Ali A. (author) / Abedi, H.R. (author)
2010-12-16
6 pages
Article (Journal)
Electronic Resource
English
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