The Effect of Ram Speed on Mechanical and Thermal Properties in ECAE Process Simulation

Abstract

Mechanical and thermal properties during equal channel angular extrusion (ECAE) process are analyzed by finite volume method simulation. Chronological effective strain behavior during ECAE was visualized by 3-dimensional simulation. Local instability during ECAE was detected by the detailed analyses (named as 'center-divided points' and 'cut-area points'), which are indicative of effective strain, effective stress, effective strain rate and temperature. Different ram speed caused different heat dissipation history and accordingly different mechanical and thermal properties during ECAE. In this simulation work, most of deformation occurred at the slip plane agreeing with theoretical prediction.

Analysis of deformation behavior in 3D during equal channel angular extrusion

“…However, the FEM showed its limit for calculating 3D analysis of large deformation such as ECAE [18]. Recently, Chung et al showed the finite volume method (FVM) capability of simulating ECAE in 3D [19]. With using the FVM technique, which has been developed from the computerized fluid dynamics (CFD), it was possible to simulate gross material flow with minimizing the remeshing problem, commonly considered as the main bottleneck in 3D large deformation simulation based on the FEM methods [20].…”

Processing and Mechanical Properties of Fine Grained Magnesium by Equal Channel Angular Pressing

“…Several researches on plastic deformation of magnesium alloys during ECAP have been analyzed using FEM/FVM. [12][13][14] However, none of the previous reports simulated fracture behavior during ECAP. Indeed, in case of ECAP for hard-todeform materials, such as magnesium and titanium, fracture prediction as well as plastic deformation analysis is necessary.…”

Suppression of Macroscopic Defects through the Control of Friction between Workpiece and Dies in a Forged Magnesium Alloy Part with Ribs

“…Recently, Chung et al [13][14][15] reported that high-strain plastic deformation, such as equal-channel-angular extrusion and double shear extrusion, could be visualized using a commercial finite-controlled volume method (FVM) code. Therefore, in the present study, rib forging was analyzed using the FVM method code of MSC.SuperForge 16) in order to visualize the velocity field distribution.…”