Abstract:
The purpose of this work is to optimize angular extrusion for sever plastic deformation of tubular specimens.
A finite element model (FEM) was built in Deform-3D® for three extrusion dies and analyzed. The dies were ECAP
(135°), TCAP with external groove of 90° (denoted as TCAP-e) and TCAP with internal groove of 90° (denoted as
TCAP-i). The analysis for process parameters (such as coefficient of friction-μ, die angles-ѱ and φ, temperature - T,
and radius ratio-R) showed that TCAP-i was the optimal die in processing Al6063 tubes based on strain and load
distribution of the model. The TCAP-i die model was further optimized for different parameters namely die angles,
coefficient of friction, deformation ratio and temperature. The results showed that at constant process temperature of
25 °C, the optimal TCAP-i has the following parameters: φ2=800, Ѱ1=300, Ѱ2=800, Ѱ3=300, μ =0.4 and R =1.5.