Numerical Simulation of Semi-Solid Billet Preparation by Equal Channel Angular Extrusion

Xiao Hua Zhang; Yan Ying Zhang; D.Z. Wu; Shou Jing Luo

doi:10.4028/www.scientific.net/SSP.141-143.683

Paper Titles

Study on Thixo-Extrusion of Semi-Solid Aluminium
p.659

Study on Apparent Viscosity of Semi-Solid Alloys during Rheocasting
p.665

Simulation of Temperature Field during Semi-Solid Magnesium Alloy Produced by Casting-Rolling Technology
p.671

Study on Thixo-Forging of AZ61 Wrought Magnesium Alloy
p.677

Numerical Simulation of Semi-Solid Billet Preparation by Equal Channel Angular Extrusion
p.683

Influence of the Pre and Post Treatment Operations on the Properties of the Thixoformed Steel Parts
p.689

Development of Adapted Heat Treatments for Steels out of the Semi-Solid State after Thixoforming
p.695

Steel Thixoforging: Heat Exchange Impact on the Mechanical and Metallurgical Features of Thixoforged Samples
p.701

Improvement in Thixoforging of 7075 Aluminium Alloys at High Solid Fraction
p.707

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Numerical Simulation of Semi-Solid Billet Preparation by Equal Channel Angular Extrusion

Abstract:

Equal channel angular extrusion (ECAE) is a technology of refining crystal grain. In this paper, ECAE was introduced into the preparation of semi-solid billet and the extrusion process was simulated using finite element method. The variation of stress (mean stress, max principle stress, effective stress), the distribution of strain, the lattice change were obtained. The results show that not only does the shear stress exist, but also the normal stress in the extrusion process; the stresses in die inner corner of channel and outer corner of channel are not the same. In the inner corner, besides the simple shear, there are compression, and in the outer corner, tension. The strain is non-homogeneous and appears a graded distribution.