Study of the structure and properties of a wrought Al–Mg–Mn aluminum alloy on a Gleeble 3800 simulator designed for physical modeling of thermomechanical processes

The mechanical behavior of aluminum alloy 5454, belonging to the system Al–Mg–Mn, is studied during hot plastic deformation on a Gleeble 3800 simulator designed for physical modeling of thermomechanical processes. The study was conducted under different temperature-rate conditions. Examination of the structure of the hot-deformed specimens showed that dynamic recrystallization is impeded in the alloy. The substructure obtained after deformation at 400°C consists mainly of equiaxed subgrains with dimensions of 1–2 μm, the exact size depending on the rate of deformation. A mathematical model that was constructed to relate the flow stress of the given alloy to the rate, temperature, and degree of deformation can be used for finite-element calculation of the properties of different sections of products of complex shape that are made of this alloy by various methods of hot plastic deformation.