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The control of texture to improve high-cyclic fatigue performance in copper after equal channel angular pressing

Orlov, Dmitry and Vinogradov, Alexei (2011) In Materials Science & Engineering: A 530. p.174-182
Abstract

High-cyclic fatigue life in ultra-fine grained materials fabricated by equal channel angular pressing (ECAP) suffers from a specific shear texture induced during the fabrication as has been demonstrated in the present study on the example of pure copper. This texture promotes orientation of the easy glide crystallographic planes to be aligned parallel to the shear plane in ECAP. If specimens for the following fatigue tests are cut parallel to the pressing direction, the alignment of the easy glide crystallographic planes deteriorates the fatigue performance. It is demonstrated that the deteriorative effect can be alleviated through the controlled degradation of the texture. This goal can be achieved through (i) a consecutive ECAP... (More)

High-cyclic fatigue life in ultra-fine grained materials fabricated by equal channel angular pressing (ECAP) suffers from a specific shear texture induced during the fabrication as has been demonstrated in the present study on the example of pure copper. This texture promotes orientation of the easy glide crystallographic planes to be aligned parallel to the shear plane in ECAP. If specimens for the following fatigue tests are cut parallel to the pressing direction, the alignment of the easy glide crystallographic planes deteriorates the fatigue performance. It is demonstrated that the deteriorative effect can be alleviated through the controlled degradation of the texture. This goal can be achieved through (i) a consecutive ECAP processing up to equivalent strains of more than e{open}≥ 8 requiring eight and more passes, or (ii) a pure-shear based post-ECAP processing to the equivalent strains as low as e{open}= 0.22. The second route is thought to be most effective in practical applications where improved fatigue performance is of concern.

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Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Copper, Equal channel angular pressing, High-cyclic fatigue, texture, Severe plastic deformation
in
Materials Science & Engineering: A
volume
530
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:82255179379
ISSN
0921-5093
DOI
10.1016/j.msea.2011.09.069
language
English
LU publication?
no
id
34e4db2d-b76b-4d8c-83ad-ee41c1e6f469
date added to LUP
2016-06-20 15:58:51
date last changed
2017-08-06 05:08:40
@article{34e4db2d-b76b-4d8c-83ad-ee41c1e6f469,
  abstract     = {<p>High-cyclic fatigue life in ultra-fine grained materials fabricated by equal channel angular pressing (ECAP) suffers from a specific shear texture induced during the fabrication as has been demonstrated in the present study on the example of pure copper. This texture promotes orientation of the easy glide crystallographic planes to be aligned parallel to the shear plane in ECAP. If specimens for the following fatigue tests are cut parallel to the pressing direction, the alignment of the easy glide crystallographic planes deteriorates the fatigue performance. It is demonstrated that the deteriorative effect can be alleviated through the controlled degradation of the texture. This goal can be achieved through (i) a consecutive ECAP processing up to equivalent strains of more than e{open}≥ 8 requiring eight and more passes, or (ii) a pure-shear based post-ECAP processing to the equivalent strains as low as e{open}= 0.22. The second route is thought to be most effective in practical applications where improved fatigue performance is of concern.</p>},
  author       = {Orlov, Dmitry and Vinogradov, Alexei},
  issn         = {0921-5093},
  keyword      = {Copper,Equal channel angular pressing,High-cyclic fatigue, texture,Severe plastic deformation},
  language     = {eng},
  month        = {12},
  pages        = {174--182},
  publisher    = {Elsevier},
  series       = {Materials Science & Engineering: A},
  title        = {The control of texture to improve high-cyclic fatigue performance in copper after equal channel angular pressing},
  url          = {http://dx.doi.org/10.1016/j.msea.2011.09.069},
  volume       = {530},
  year         = {2011},
}