study of radial-shear rolling features and properties evolution of 1050A aluminum alloy

The main goal of this study is to analyze the influence of radial-shear rolling (RSR) modes on the structure and properties of 1050A using finite element modeling (FEM) and experimental verification of the results. Ingots with a diameter of 60 mm were obtained, which were rolled into rods with a diameter of 14 mm at different regimes (total elongation ratio µ = 18.4). After rolling, the evolution of the microstructure and mechanical properties of the resulting rods were investigated. It is established that during RSR process the nonuniform change in temperature-velocity and deformation parameters occurs in the volume of deformable body, which determines the forming of gradient spiral structure. FEM was used for good understanding processes of microstructure evolution and properties depending on parameters of RSR methods. Based on the FEM simulation the change in temperature and strain rates in the volume of deformed body at different temperature (T=25 up to 350 °C) was obtained. Depending on the selected temperature-velocity parameters it is possible to obtain a different combination of mechanical properties (UTS ~ 94 up to 20 MPa; YS ~ 88 up to 110 MPa; e = 1 up to 43.5 %). The strength of obtained RSR rods from 1050A alloy at all regimes is significantly higher than the strength of industrial rods in a hot-pressed condition that shows the application prospect of RSR process as efficient method of controlled plastic deformation of aluminum alloys and obtaining long rods.