Abstract
Hot roll bonding of 4343/4A60 aluminum alloy has been performed in the Gleeble-3500 thermal simulator. The bonding process constitutive behavior has been analyzed. The results show that the peak flow stress decreases with the deformation temperature and strain rate reduction. An Arrhenius-type constitutive equation is used to describe the constitutive behavior of the hot-rolled 4343/4A60 aluminum alloy with the thermal deformation activation energy Q = 118.48 kJ/mol. The alloy microstructure and dynamic recrystallization are studied using the optical microscope. It is revealed that in the temperature range between 573 and 623 K the dynamic recovery has a strong effect on the alloy microstructure evolution. It has been also concluded that the dynamic recovery is the basic softening mechanism of 4343/4A60 composite.
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