|About this Abstract
||2011 TMS Annual Meeting & Exhibition
||Aluminum Alloys: Fabrication, Characterization and Applications
||Hot Deformation Behaviour of 7075 Al Alloy
||Hossein Mohammadi, Mostafa Ketabchi
|On-Site Speaker (Planned)
7075 Al alloy is one of the most used high-strength materials for aircraft structural components. In the present work, the effect of hot deformation parameters such as temperature and strain rate on the dynamic restoration processes of a 7075 Al alloy was studied. Hot compression tests were performed in the temperature range of 300-500˚C and the strain rate range of 0.001-0.1 s⁻¹. The results show that the true stress–true strain curves exhibit a peak stress at a critical strain, after which the flow stresses decrease monotonically until high strains, showing a dynamic flow softening. The peak stress level decreases with increasing deformation temperature and decreasing strain rate, which can be represented by a Zener–Hollomon parameter in the hyperbolic-sine equation with the hot deformation activation energy of 125 kJ/mol.
||Planned: A print-only volume