INVESTIGATING THE EFFECT OF TWOSTEP （调查两步的效果）.pdf

MAGNT Research Report (ISSN. 1444-8939) Vol.2 (2). PP:32-39 INVESTIGATING THE EFFECT OF TWO-STEP ANGLE FORMAT IN EQUAL CHANNEL ANGULAR EXTRUSION PROCESS MOHSEN EGHBALIAN ARANI Department of Mechanical Engineering, Kashan Branch, Islamic Azad University, Kashan, Iran Abstract : Equal Channel Angular Extrusion Process (ECAE) is one of the methods of production of microstructure and nanostructure material. In the previous research published, the effect of change in the parameters in the available form of Geometry was evaluated. In this paper new frameworks propose, as a two-stage, for reviewing ECAE process is presented. Therefore, instead of just two channels of input and output, three channels are used. An added channel in fact plays roles of the interface channel for input and output channels in order to divide the angle format. For this purpose, the finite element simulation is used. In the beginning of a Sample process, simulation results are compared with the analytical results and the validity of the theory upper bound on the simulation results is shown. Then with the two-stage target forms, the effect of two-step of angle form on force process and the equivalent plastic obeisance ingot output is checked. Simulations with using the version 6.9 software ABAQUS are performed. The results indicate that the two-step molding angle reduces the maximum force in shaping the ECAE process that is due to breaking the format angle in two stages. Also the two-stage molding angle increases the time to reach maximum force in shaping the process. Keywords: ECAE Process, Angle of a Two-Level Format, Shaping Force, Equivalent Plastic Strain conventional extrusion, deformation of