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Investigation of thermal and mechanical effects during electrically-assisted microbending.

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Title: Investigation of thermal and mechanical effects during electrically-assisted microbending.
Authors: Jordan, Adam1, Kinsey, Brad L.1 bkinsey@unh.edu
Source: Journal of Materials Processing Technology. Jul2015, Vol. 221, p1-12. 12p.
Subjects: Deformation of surfaces, Geometric analysis, Deformations (Mechanics), Microbending, Thermal properties, Properties of matter
Abstract: The application of electrical current to conductive metals during deformation processes has been shown to reduce the flow stress required, increase the potential elongation prior to failure, and decrease the springback observed. These are believed to be beyond what can be explained by elevated temperatures due to resistive heating alone, i.e., an additional electro-plastic effect is supposed to be relevant. Further experimental data (including force, strain distribution, and temperature) for a standard deformation process would provide insight into the effects involved. In this paper, results from electrically-assisted (EA), three-point bending of C260 (brass) sheet metal with a 0.5 mm thickness are presented. The strain distributions are measured using a stereomicroscope system with digital imaging correlation (DIC) while temperature was measured using a thermal imaging camera. Results show that the strain distribution through the thickness was more uniform for the EA case (in particular for coarse grain structures) which has not been shown in past literature. Also, the bending force decreased only during a temperature spike at the beginning of the process. Therefore for this specific application, an electroplastic effect was not observed with 40 A/mm 2 being applied to the specimens, and variations observed were simply caused by temperature effects. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Materials Processing Technology is the property of Elsevier B.V. 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
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Header DbId: egs
DbLabel: Engineering Source
An: 101942241
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
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  Data: Investigation of thermal and mechanical effects during electrically-assisted microbending.
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  Data: <searchLink fieldCode="AR" term="%22Jordan%2C+Adam%22">Jordan, Adam</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kinsey%2C+Brad+L%2E%22">Kinsey, Brad L.</searchLink><relatesTo>1</relatesTo><i> bkinsey@unh.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Materials+Processing+Technology%22">Journal of Materials Processing Technology</searchLink>. Jul2015, Vol. 221, p1-12. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Deformation+of+surfaces%22">Deformation of surfaces</searchLink><br /><searchLink fieldCode="DE" term="%22Geometric+analysis%22">Geometric analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Microbending%22">Microbending</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+properties%22">Thermal properties</searchLink><br /><searchLink fieldCode="DE" term="%22Properties+of+matter%22">Properties of matter</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The application of electrical current to conductive metals during deformation processes has been shown to reduce the flow stress required, increase the potential elongation prior to failure, and decrease the springback observed. These are believed to be beyond what can be explained by elevated temperatures due to resistive heating alone, i.e., an additional electro-plastic effect is supposed to be relevant. Further experimental data (including force, strain distribution, and temperature) for a standard deformation process would provide insight into the effects involved. In this paper, results from electrically-assisted (EA), three-point bending of C260 (brass) sheet metal with a 0.5 mm thickness are presented. The strain distributions are measured using a stereomicroscope system with digital imaging correlation (DIC) while temperature was measured using a thermal imaging camera. Results show that the strain distribution through the thickness was more uniform for the EA case (in particular for coarse grain structures) which has not been shown in past literature. Also, the bending force decreased only during a temperature spike at the beginning of the process. Therefore for this specific application, an electroplastic effect was not observed with 40 A/mm 2 being applied to the specimens, and variations observed were simply caused by temperature effects. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Materials Processing Technology is the property of Elsevier B.V. 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.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.jmatprotec.2015.01.021
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 12
        StartPage: 1
    Subjects:
      – SubjectFull: Deformation of surfaces
        Type: general
      – SubjectFull: Geometric analysis
        Type: general
      – SubjectFull: Deformations (Mechanics)
        Type: general
      – SubjectFull: Microbending
        Type: general
      – SubjectFull: Thermal properties
        Type: general
      – SubjectFull: Properties of matter
        Type: general
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      – TitleFull: Investigation of thermal and mechanical effects during electrically-assisted microbending.
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            NameFull: Jordan, Adam
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            NameFull: Kinsey, Brad L.
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            – D: 01
              M: 07
              Text: Jul2015
              Type: published
              Y: 2015
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              Value: 221
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            – TitleFull: Journal of Materials Processing Technology
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