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Role of strain reversal in grain refinement by severe plastic deformation

Orlov, Dmitry; Todaka, Yoshikazu; Umemoto, Minoru and Tsuji, Nobuhiro (2009) In Materials Science & Engineering: A 499(1-2). p.427-433
Abstract
Most of severe plastic deformation processes involve strain reversal. Till now quite big number of researches has been done on indirect study of its role, which discusses the effect of loading path in ultra-fine grained structure formation. This work is aimed to study directly the role of the strain reversal in grain refinement by severe plastic deformation. A 99.99% purity aluminum was processed by high pressure torsion up to 96° rotation (maximal equivalent strain ε ≈ 8) with two deformation modes: monotonic and reversal deformations with a step of 12° rotation (maximal equivalent strain ε ≈ 1). It was shown that strain reversal retarded the grain refinement in comparison with the monotonic deformation. This explains slower rate of the... (More)
Most of severe plastic deformation processes involve strain reversal. Till now quite big number of researches has been done on indirect study of its role, which discusses the effect of loading path in ultra-fine grained structure formation. This work is aimed to study directly the role of the strain reversal in grain refinement by severe plastic deformation. A 99.99% purity aluminum was processed by high pressure torsion up to 96° rotation (maximal equivalent strain ε ≈ 8) with two deformation modes: monotonic and reversal deformations with a step of 12° rotation (maximal equivalent strain ε ≈ 1). It was shown that strain reversal retarded the grain refinement in comparison with the monotonic deformation. This explains slower rate of the nanostructure formation of the SPD processes that involve strain reversal. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Aluminum
in
Materials Science & Engineering: A
volume
499
issue
1-2
pages
7 pages
publisher
Elsevier
external identifiers
  • scopus:55949085745
ISSN
0921-5093
DOI
10.1016/j.msea.2008.09.036
language
English
LU publication?
no
id
558316de-89a8-4729-ae95-3f697b840410
date added to LUP
2016-06-20 15:59:22
date last changed
2017-10-01 05:20:47
@article{558316de-89a8-4729-ae95-3f697b840410,
  abstract     = {Most of severe plastic deformation processes involve strain reversal. Till now quite big number of researches has been done on indirect study of its role, which discusses the effect of loading path in ultra-fine grained structure formation. This work is aimed to study directly the role of the strain reversal in grain refinement by severe plastic deformation. A 99.99% purity aluminum was processed by high pressure torsion up to 96° rotation (maximal equivalent strain ε ≈ 8) with two deformation modes: monotonic and reversal deformations with a step of 12° rotation (maximal equivalent strain ε ≈ 1). It was shown that strain reversal retarded the grain refinement in comparison with the monotonic deformation. This explains slower rate of the nanostructure formation of the SPD processes that involve strain reversal.},
  author       = {Orlov, Dmitry and Todaka, Yoshikazu and Umemoto, Minoru and Tsuji, Nobuhiro},
  issn         = {0921-5093},
  keyword      = {Aluminum},
  language     = {eng},
  month        = {01},
  number       = {1-2},
  pages        = {427--433},
  publisher    = {Elsevier},
  series       = {Materials Science & Engineering: A},
  title        = {Role of strain reversal in grain refinement by severe plastic deformation},
  url          = {http://dx.doi.org/10.1016/j.msea.2008.09.036},
  volume       = {499},
  year         = {2009},
}