The Finite Element Simulation And Investigation Of Micro-structure Of The 6063 Aluminum Alloy By Multi-axial Plane Compression

The multi-axial plane compression process can achieve severe plastic deformation as a performing, which can refine grains and change the distribution ofβphase to make material uniform in order to improve performance as a novel technology. In the present few reports are available about the application of the process in the world, In this paper the 6063 aluminum alloy is chosen as the samples to study the effects of annealing process and the extrusion process on the structure and properties of aluminum alloy, then deformation behaviors and the problems of the extrusion process. The extrusion process simulates through the finite element simulation, and solves process problems, in order to improve and optimize the extrusion process and provide the experimental data and the oretical basis.In this paper, optical microscopy (OM), scanning electron microscopy (SEM), energy spectrum analysis, transmission electron microscopy (TEM), vickers hardness and other materials analysis test tools, the microstructure and mechanical properties of materials, all-pass extruded state, after heat treatment are analyzed.The results show that the multi-axial plane compression process is a novel deformation process, the deformation through the new process not only makes the aluminum grains can be refined, but also to adjust the distribution of the second phase in aluminum alloy, the hardness has been improved. The deformation method is different from the other channel distortion, such as channel distortion, the aluminum alloy has deformation zone and stable region, there is no change in the distribution of the second phase, it does not help to change the uneven distribution of the second phase, but also the existence of anisotropy, the novel deformation method can significantly change its shortcomings, markedly improved the distribution of its second phase homogenization, making aluminum in the second phase particles to increase the distance between the campaign to promote its second-phase particles distributed more evenly. The multi-axial plane compression is also different from other forming processes such as uniaxial rolling, one-axial compression, because the multi-axial plane compression load axis are constantly changing, the direction of maximum strainε1 along the axis x, y, z three directions cyclic changes in materials during deformation along the x, y, z in three directions can be compressed and stretched, repeated deformation, which not only refine the grain, but also detailed the second phase, dispersion of second phase .Although this process is similar to multi-forging process, but it is different from the multi-forging process, multi-forging process is a kind of free forging process, the deformation can be divided into three deformation zones, deformation and stress state are more complicated, while the multi-axial plane compression process is a plane deformation, stress state is three direction compressive, deformation and stress state are relatively simple, so the multi-axial plane compression can enhance the plastic property of metals. For the every pass of the multi-axial plane compression, the metal can flow along a certain direction, thus preventing the return of metal, but also better able to control the deformation.