View in EDS

Microstructural effect on time-dependent plasticity of nanoporous gold.

Saved in:
Bibliographic Details
Title: Microstructural effect on time-dependent plasticity of nanoporous gold.
Authors: Kang, Na-Ri1, Gwak, Eun-Ji1, Jeon, Hansol1, Song, Eunji1, Kim, Ju-Young1 juyoung@unist.ac.kr
Source: International Journal of Plasticity. Oct2018, Vol. 109, p108-120. 13p.
Subjects: Microstructure, Grain size, Crystallography, Crystal grain boundaries, Material plasticity
Abstract: Annealed, prestrained, and ball-milled nanoporous gold (np-Au) samples were prepared. Since the microstructures of the precursor alloys, such as the crystallographic orientation and grain size, were mostly preserved during the dealloying process, prestrained np-Au is believed to have higher initial dislocation density, and ball-milled np-Au is believed to have higher densities of initial dislocation and grain boundary comparing to annealed np-Au. The time-dependent deformation behavior of np-Au samples with various microstructures was characterized with two parameters; creep strain exponent n and activation volume V ∗ using spherical nanoindentation creep tests. We found that primary mechanism of time-dependent plasticity for annealed and prestrained np-Au samples is dislocation slip and that for ball-milled np-Au sample is grain boundary sliding. In dislocation slip-dominant time-dependent deformation in np-Au, a higher initial dislocation density lowers n and V ∗ . In grain boundary sliding-dominant time-dependent deformation in np-Au, the values of n and V ∗ are similar to those for dislocation slip-dominant time-dependent deformation; however, the creep strain rate in quasi-steady-state is higher than that for dislocation slip-dominant time-dependent deformation. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Plasticity is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 131403679
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Microstructural effect on time-dependent plasticity of nanoporous gold.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Kang%2C+Na-Ri%22">Kang, Na-Ri</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Gwak%2C+Eun-Ji%22">Gwak, Eun-Ji</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Jeon%2C+Hansol%22">Jeon, Hansol</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Song%2C+Eunji%22">Song, Eunji</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kim%2C+Ju-Young%22">Kim, Ju-Young</searchLink><relatesTo>1</relatesTo><i> juyoung@unist.ac.kr</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Plasticity%22">International Journal of Plasticity</searchLink>. Oct2018, Vol. 109, p108-120. 13p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Grain+size%22">Grain size</searchLink><br /><searchLink fieldCode="DE" term="%22Crystallography%22">Crystallography</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+grain+boundaries%22">Crystal grain boundaries</searchLink><br /><searchLink fieldCode="DE" term="%22Material+plasticity%22">Material plasticity</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Annealed, prestrained, and ball-milled nanoporous gold (np-Au) samples were prepared. Since the microstructures of the precursor alloys, such as the crystallographic orientation and grain size, were mostly preserved during the dealloying process, prestrained np-Au is believed to have higher initial dislocation density, and ball-milled np-Au is believed to have higher densities of initial dislocation and grain boundary comparing to annealed np-Au. The time-dependent deformation behavior of np-Au samples with various microstructures was characterized with two parameters; creep strain exponent n and activation volume V ∗ using spherical nanoindentation creep tests. We found that primary mechanism of time-dependent plasticity for annealed and prestrained np-Au samples is dislocation slip and that for ball-milled np-Au sample is grain boundary sliding. In dislocation slip-dominant time-dependent deformation in np-Au, a higher initial dislocation density lowers n and V ∗ . In grain boundary sliding-dominant time-dependent deformation in np-Au, the values of n and V ∗ are similar to those for dislocation slip-dominant time-dependent deformation; however, the creep strain rate in quasi-steady-state is higher than that for dislocation slip-dominant time-dependent deformation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Plasticity is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=131403679
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.ijplas.2018.05.011
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 13
        StartPage: 108
    Subjects:
      – SubjectFull: Microstructure
        Type: general
      – SubjectFull: Grain size
        Type: general
      – SubjectFull: Crystallography
        Type: general
      – SubjectFull: Crystal grain boundaries
        Type: general
      – SubjectFull: Material plasticity
        Type: general
    Titles:
      – TitleFull: Microstructural effect on time-dependent plasticity of nanoporous gold.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Kang, Na-Ri
      – PersonEntity:
          Name:
            NameFull: Gwak, Eun-Ji
      – PersonEntity:
          Name:
            NameFull: Jeon, Hansol
      – PersonEntity:
          Name:
            NameFull: Song, Eunji
      – PersonEntity:
          Name:
            NameFull: Kim, Ju-Young
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 10
              Text: Oct2018
              Type: published
              Y: 2018
          Identifiers:
            – Type: issn-print
              Value: 07496419
          Numbering:
            – Type: volume
              Value: 109
          Titles:
            – TitleFull: International Journal of Plasticity
              Type: main
ResultId 1