On the Tool Stress Analysis in Twin Parallel Channel Angular Extrusion

Twin Parallel Channel Angular Extrusion (TPCAE) is a newly presented severe plastic deformation (SPD) technique in which two specimens can be processed simultaneously. This method is capable of processing more volumes of materials in addition to less energy consumption. In the present work, stress analysis of tools in this method was conducted using DEFORM 2D finite element software package. Moreover, in order to compare the results with the stress configuration in the conventional Equal Channel Angular Extrusion (ECAE) process in parallel channels, named Single Parallel Channel Angular Extrusion (SPCAE), stress analysis was also conducted with the same processing condition as TPCAE simulation. The results illustrate that TPCAE is a method with lower magnitudes of stress concentrations in the die and lower overall stress magnitudes in the punch with respect to the SPCAE. In addition, it was found that on the contrary to SPCAE, there is a symmetrical stress distribution in the punch and die in TPCAE, bringing about more lifetime for this method.