科研之友
微信
新浪微博
Facebook
分享链接
摘要
Equal channel angular extrusion (ECAE) process of AZ31 magnesium alloy was studied by finite element simulation and experiment. The optimized die cavity geometry and suitable process parameters are determined, which provides reliable theoretical reference and process scheme. X-ray diffraction analysis of the extruded sample was carried out. The results show that ECAE is a non-uniform severe plastic deformation process, and the main form of producing severe plastic deformation is dislocation slip. With the accumulation of deformation, the dislocations in magnesium alloy extrusion parts propagate constantly, and the dislocation line generates gradually. Finally, the grain boundaries increase and grains are refined. At the same time, the mechanical test analysis was carried out, and the mechanical property distribution of multi-pass ECAE sample was obtained. Combined with the results of finite element analysis, in the multi-pass ECAE process of AZ31 magnesium alloy, the deformation non-uniformity of the extruded samples can be avoided by selecting the optimized die cavity geometry, suitable process parameters and extrusion routes. ? 2021, Editorial Board of Journal of Plasticity Engineering. All right reserved.
- 单位
