Deformation Behaviors of 2219 Aluminium Alloy in Hot Multi-direcrional Forging Process

Abstract

The hot multi-direcrional forging (MDF) process of 2219 aluminium alloy was simulated and the MDF test was carried out. The deformation behaviors of 2219 aluminium alloy were investigated in this paper, and the metal flow rule, temperature field variation and the strain variation were focused on. The results show that in the forging process, the metal flow velocity decreases gradually from top to bottom of the forgings. Meanwhile, on a horizontal section, the closer to four vertical edges, the smaller velocity of metal flow was obtained. After the forging process, the highest temperature appeared in the central area inside the forgings, followed by the four long edges, and the lowest temperature area is the eight sharp corners. The strain in each part of the forgings increased gradually with the increase of forging times. The maximum cumulative strain (12.5) and minimum cumulative strain (4.9) appeared in the central area inside the forgings and in the center area of the forging surface, respectively. In addition, in the whole MDF process, the highest temperature of 2219 aluminum alloy forging was 470 ℃, which is lower than their over burnt temperature.