Simulation Study on Equal Channel Right Angular Extrusion Process of Aluminum Alloy 6061

Simulation of aluminum alloy 6061 equal channel right angle extrusion is performed by using Deform-3D finite element software. The microstructure changes before and after extrusion deformation is investigated through experiment corresponding to simulation working condition. The results show that the uniformity of the deformation process is affected by the factors such as friction coefficient and extrusion paths. The single-pass extruded specimens show a lot of long banded structures along the shear direction. After the first extrusion, the sample rotates 90 degrees along the axis for the second extrusion along the same path, and the grain refinement and distribution uniformity are enhanced. The suitable friction coefficient is beneficial to the accumulation of equivalent strain value. The grain is elongated along the extrusion direction during deformation and the elongated direction is affected by the friction factors. The Angle between the elongated direction and the friction surface is from 0 to 45 degrees.