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Features of twist extrusion : Method, structures & material properties

Beygelzimer, Yan; Orlov, Dmitry; Korshunov, Alexander; Synkov, Sergey; Varyukhin, Victor; Vedernikova, Irina; Reshetov, Alexey; Synkov, Alexandr; Polyakov, Lev and Korotchenkova, Irina (2006) 6th High Pressure School- Symposium I of the E-MRS Fall Meeting 2005 In Solid State Phenomena 114. p.69-78
Abstract

During the last decade it has been shown that severe plastic deformation (SPD) is a very effective for obtaining ultra-fine grained (UFG) and nanostructured materials. The basic SPD methods are High Pressure Torsion (HPT) and Equal Channel Angular Extrusion (ECAE). Recently several new methods have been developed: 3D deformation, Accumulative Roll Bonding, Constrained Groove Pressing, Repetitive Corrugation and Straightening, Twist Extrusion (TE), etc. In this paper the twist extrusion method is analyzed in terms of SPD processing and the essential features from the "scientific" and "technological" viewpoint are compared with other SPD techniques. Results for commercial, 99.9 wt.% purity, copper processed by TE are reported to show the... (More)

During the last decade it has been shown that severe plastic deformation (SPD) is a very effective for obtaining ultra-fine grained (UFG) and nanostructured materials. The basic SPD methods are High Pressure Torsion (HPT) and Equal Channel Angular Extrusion (ECAE). Recently several new methods have been developed: 3D deformation, Accumulative Roll Bonding, Constrained Groove Pressing, Repetitive Corrugation and Straightening, Twist Extrusion (TE), etc. In this paper the twist extrusion method is analyzed in terms of SPD processing and the essential features from the "scientific" and "technological" viewpoint are compared with other SPD techniques. Results for commercial, 99.9 wt.% purity, copper processed by TE are reported to show the effectiveness of the method. UFG structure with an average grain size of ∼0,3 um was produced in Cu billets by TE processing. The mechanical properties in copper billets are near their saturation after two TE passes through a 60° die. Subsequent processing improves homogeneity and eliminates anisotropy. The homogeneity of strength for Cu after TE is lower than after ECAE by route Bc, but higher than after ECAE by route C. The homogeneity in ductility characteristics was of almost of inverse character. The comparison of mechanical properties inhomogeneity in Cu after TE and ECAE suggests that alternate processing by ECAE and TE should give the most uniform properties.

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Please use this url to cite or link to this publication:
author
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
keywords
Grain refinement, Properties, Severe plastic deformation, Structure, Twist extrusion
in
Solid State Phenomena
volume
114
pages
10 pages
publisher
Trans Tech Publications Ltd
conference name
6th High Pressure School- Symposium I of the E-MRS Fall Meeting 2005
external identifiers
  • scopus:34047246049
ISSN
10120394
ISBN
3908451221
9783908451228
DOI
10.4028/3-908451-22-1.69
language
English
LU publication?
no
id
113a67cb-7ccb-409c-8f50-a3e3c7d87239
date added to LUP
2016-06-20 15:46:54
date last changed
2017-04-20 12:45:12
@inproceedings{113a67cb-7ccb-409c-8f50-a3e3c7d87239,
  abstract     = {<p>During the last decade it has been shown that severe plastic deformation (SPD) is a very effective for obtaining ultra-fine grained (UFG) and nanostructured materials. The basic SPD methods are High Pressure Torsion (HPT) and Equal Channel Angular Extrusion (ECAE). Recently several new methods have been developed: 3D deformation, Accumulative Roll Bonding, Constrained Groove Pressing, Repetitive Corrugation and Straightening, Twist Extrusion (TE), etc. In this paper the twist extrusion method is analyzed in terms of SPD processing and the essential features from the "scientific" and "technological" viewpoint are compared with other SPD techniques. Results for commercial, 99.9 wt.% purity, copper processed by TE are reported to show the effectiveness of the method. UFG structure with an average grain size of ∼0,3 um was produced in Cu billets by TE processing. The mechanical properties in copper billets are near their saturation after two TE passes through a 60° die. Subsequent processing improves homogeneity and eliminates anisotropy. The homogeneity of strength for Cu after TE is lower than after ECAE by route Bc, but higher than after ECAE by route C. The homogeneity in ductility characteristics was of almost of inverse character. The comparison of mechanical properties inhomogeneity in Cu after TE and ECAE suggests that alternate processing by ECAE and TE should give the most uniform properties.</p>},
  author       = {Beygelzimer, Yan and Orlov, Dmitry and Korshunov, Alexander and Synkov, Sergey and Varyukhin, Victor and Vedernikova, Irina and Reshetov, Alexey and Synkov, Alexandr and Polyakov, Lev and Korotchenkova, Irina},
  booktitle    = {Solid State Phenomena},
  isbn         = {3908451221},
  issn         = {10120394},
  keyword      = {Grain refinement,Properties,Severe plastic deformation,Structure,Twist extrusion},
  language     = {eng},
  pages        = {69--78},
  publisher    = {Trans Tech Publications Ltd},
  title        = {Features of twist extrusion : Method, structures & material properties},
  url          = {http://dx.doi.org/10.4028/3-908451-22-1.69},
  volume       = {114},
  year         = {2006},
}