Constitutive modelling of extrusion of lead with cyclic torsion

Authors
Kong, LX Hodgson, PD
Citation
Lx. Kong et Pd. Hodgson, Constitutive modelling of extrusion of lead with cyclic torsion, MAT SCI E A, 276(1-2), 2000, pp. 32-38
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN journal
09215093 → ACNP
Volume
276
Issue
1-2
Year of publication
2000
Pages
32 - 38
Database
ISI
SICI code
0921-5093(20000115)276:1-2<32:CMOEOL>2.0.ZU;2-F
Abstract
The cyclic rotation of a circular die during the extrusion of lead bars res ults in a complex load-displacement behaviour. The average load under these conditions is significantly (up to 25%) lower than for simple extrusion wi th no die rotation. The data was used to successfully develop an empirical constitutive model. The main features include an increase in the extrusion load when the die undergoes a reversal in the twisting direction. This tran sient behaviour is then followed by a practically constant reduced extrusio n force. (C) 2000 Elsevier Science S.A. All rights reserved.