On the Velocity and the Strain Rate Field in Unlubricated Direct and Indirect Axisymmetric Extrusion of Al

Sepinood Torabzadeh Khorasani; Henry Valberg

doi:10.4028/www.scientific.net/KEM.611-612.1013

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 611-612On the Velocity and the Strain Rate Field in...

On the Velocity and the Strain Rate Field in Unlubricated Direct and Indirect Axisymmetric Extrusion of Al

Abstract:

The velocity and strain rate fields in the primary deformation zone ahead of the extrusion die opening are investigated by theory and FE-simulation for direct and indirect Al extrusion. The metal flow obtained in the FEM-models of extrusion is compared with the flow recorded in previous experiments and it is shown that the FE-analysis mimics real metal flow with good accuracy. The velocity and the strain rate fields computed by FEA (using DEFORM^® 2D) are described and comparison is made with the idealized spherical velocity field of Avitzur, to see if there is good agreement between the results from theory and FEA, and the correlation between the results from the two is discussed. Moreover, a clear difference in metal flow is confirmed between the two processes direct (FwE) and indirect extrusion (BwE).

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Key Engineering Materials (Volumes 611-612)

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1013-1020

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https://doi.org/10.4028/www.scientific.net/KEM.611-612.1013

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May 2014

Authors:

Sepinood Torabzadeh Khorasani*, Henry Valberg

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