Deakin home > Deakin University Library > Deakin Research Online > Multi equal channel angular pressing with rotational dies

Multi equal channel angular pressing with rotational dies

Kim, Y. H., Ma, Xiang, Hodgson, Peter and Barnett, Matthew 2003, Multi equal channel angular pressing with rotational dies, Materials science forum, vol. 426, no. 432, pp. 2777-2782.

Attached Files (Some files may be inaccessible until you login with your Deakin Research Online credentials)
Name Description MIMEType Size Downloads

Title Multi equal channel angular pressing with rotational dies
Author(s) Kim, Y. H.
Ma, Xiang
Hodgson, Peter
Barnett, Matthew
Journal name Materials science forum
Volume number 426
Issue number 432
Start page 2777
End page 2782
Publisher Trans Tech Publications
Place of publication Zurich, Switzerland
Publication date 2003
ISSN 0255-5476
Keyword(s) rotational dies
ultra-fine grain
FEM
ECAP
upper bound method
Summary The recent successful development of the equal channel angular pressing (ECAP) process in metals provides a feasible solution to produce ultra-fine or nano-grained bulk: materials with tailored material properties. However, ECAP is difficult to scale up commercially due to excessive load requirements. In this paper, a new Multi-ECAP process with die rotation is considered to obtain ultra-fine grain structured materials under a moderate deformation force. It is shown that an addition of torsion results in a reduction in the pressing force and an increase in severity of plastic deformation. An analysis using the upper bound method is found to be useful in predicting the pressing load and flow pattern of ECAP with and without rotational dies. Solutions are obtained for different inclined channel angles under different angular velocities of dies. Relative pressures are presented and some computed solutions are compared with those found by FEM simulation. The theoretical predictions of the pressing load are in good agreement with the simulation results. The amount of plastic deformation is determined by the inclined angle between the two intersecting channels, and the velocity ratio between the angular velocity of dies and the normal component of the punch velocity.
Language eng
Field of Research 091207 Metals and Alloy Materials
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2003, Trans Tech Publications
Persistent URL http://hdl.handle.net/10536/DRO/DU:30008645

Document type: Journal Article
Collection: School of Engineering and Technology
Connect to link resolver
 
Unless expressly stated otherwise, the copyright for items in Deakin Research Online is owned by the author, with all rights reserved.

Versions
Version Filter Type
Citation counts: Scopus Citation Count Cited 2 times in Scopus
Access Statistics: 433 Abstract Views, 0 File Downloads  -  Detailed Statistics
Created: Mon, 13 Oct 2008, 15:37:57 EST