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A kinematics study of variable lead axisymmetric forward spiral extrusion

journal contribution
posted on 2012-07-30, 00:00 authored by Shahin Khoddam, A Farhoumand, Peter HodgsonPeter Hodgson
Variable lead axi-symmetric forward spiral extrusion (VLAFSE) allows far more efficient strain accumulation than constant lead counterpart AFSE. It eliminates the rigid body rotation of the sample in an AFSE die which only causes frictional loss and has no contribution to the deformation. Based on a proposed velocity field, the kinematic formulation for VLAFSE is presented, utilized to predict strain components in the deformation zone and compared with experimental measurements. A simple closed form solution of the VLAFSE problem is presented which describes the flow of material inside the extrusion die. The results confirm that the effective strain of the process accumulates non-linearly in the both radial and extrusion directions.

History

Journal

Materials science and engineering A

Volume

550

Pagination

167 - 175

Publisher

Elsevier B.V.

Location

Amsterdam, The Netherlands

ISSN

0921-5093

Language

eng

Publication classification

C Journal article; C1.1 Refereed article in a scholarly journal

Copyright notice

2012, Elsevier B.V.