Effect of Deformation on Microstructure, Texture and Properties of 2024 Aluminum Alloy

In this paper, the effects of different deformation on the microstructure and properties of 2024 aluminum alloy were systematically studied by means of optical microscope (OM), scanning electron microscope (SEM), electron backscatter diffraction (EBSD), and mechanical and corrosion performance tests. The results show that with the increase in cold rolling deformation, the alloy shows obvious multilateralization and recrystallization after annealing. The recrystallization of small particle size makes the average grain size decrease, the microhardness and yield strength increase, the elongation and corrosion resistance decrease, while the tensile strength decreases first and then increases. The strengthening mechanism of the alloy changes from deformation strengthening to the comprehensive influence of deformation strengthening and fine grain strengthening. There are two evolution paths for the internal texture of the alloy: Brass → m-Brass and R-Cu → Near rotated Cube → Goss and Cube for small and medium deformation, Copper → α_55° and Cu_35° → P and brass R for large deformation.