Effect of acute tool-angles on equal channel angular extrusion/pressing

Anumalasetty, V. N., Tick-Hon, Yip, Li, S. and Seow, H. P. (2005) Effect of acute tool-angles on equal channel angular extrusion/pressing. Materials Science and Engineering: A, 410-411 269-272. doi:10.1016/j.msea.2005.08.043


Author Anumalasetty, V. N.
Tick-Hon, Yip
Li, S.
Seow, H. P.
Title Effect of acute tool-angles on equal channel angular extrusion/pressing
Journal name Materials Science and Engineering: A   Check publisher's open access policy
ISSN 0921-5093
Publication date 2005-11-25
Sub-type Article (original research)
DOI 10.1016/j.msea.2005.08.043
Volume 410-411
Start page 269
End page 272
Total pages 4
Publisher Elsevier B.V.
Language eng
Subject 09 Engineering
0913 Mechanical Engineering
Abstract Acute tool-angles in equal channel angular extrusion (ECAE) can increase the strain induced in the material within minimum number of passes. Such increased strains can yield ultrafine grains and high fraction of high angle grain boundaries, which enhance mechanical and superplastic properties. However, the deformation and punch pressure requirements will be more stringent demanding detailed investigation. In this study, finite element simulations of ECAE were carried with Abaqus/Explicit for die/channel angles of 60° and 75° in comparison to 90°. Outer corner angle of 10° was considered for all simulations. Factual phenomena like strain hardening of material and friction were considered for the simulations. Deformation was found to take place in three steps for acute channel angles phi = 60° and 75°, two steps for that of 90°. Corner gap, which is often the major drawback in the case of 90° channel angle, was not a factor for the acute channel angles. Punch pressure requirements were also found to be high with acute tool-angles.
Keyword Equal channel angular extrusion
Equal channel angular pressing
Severe plastic deformation
Finite element analysis
Acute die angle
Flow of material
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown
Additional Notes Available online 26 September 2005. Presented at the Langdon Symposium: Flow and forming of Crystalline Materials

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Information Technology and Electrical Engineering Publications
 
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Created: Wed, 23 Dec 2009, 14:15:13 EST by Rosalind Blair on behalf of Faculty Of Engineering, Architecture & Info Tech