The evolution of in-grain misorientation axes (IGMA) during deformation of wrought magnesium alloy AZ31

Y. B. Chun, C.H.J. Davies

Research output: Chapter in Book/Report/Conference proceedingChapter (Book)Otherpeer-review

Abstract

Understanding deformation mechanisms is a prerequisite for the development of more formable magnesium alloys. We have developed a novel approach based on analysis of in-grain misorientation axes which allows identification of the dominant slip system for a large number of grains. We investigated the effects of orientations and temperatures on active deformation mechanisms during the rolling of AZ31, including slip, deformation twinning and deformation banding. The IGMA analysis suggests that increasing rolling temperature promotes activation of prism <a> slip which enhances the rollability of the plate favorably oriented for this slip mode. The approach also reveals an orientation-dependent occurrence of deformation banding and its crystallographic relationship with parent grain. It is concluded that IGMA analysis can be effectively used to study deformation mechanism in hcp metals, and can be used as a criterion for validating some crystal plasticity models.

Original languageEnglish
Title of host publicationEssential Readings in Magnesium Technology
EditorsSuveen N. Mathaudhu, Alan A. Luo, Neale R. Neelameggham, Eric A. Nyberg, Wim H. Sillekens
Place of PublicationHoboken NJ USA
PublisherJohn Wiley & Sons
Pages345-349
Number of pages5
ISBN (Electronic)9781118859803
ISBN (Print)9781118858943
DOIs
Publication statusPublished - 3 Mar 2014

Keywords

  • Deformation bands
  • Deformation twinning
  • Electron back-scattering diffraction
  • In-grain misorientation axes (IGMA)
  • Magnesium
  • Slip

Cite this

Chun, Y. B., & Davies, C. H. J. (2014). The evolution of in-grain misorientation axes (IGMA) during deformation of wrought magnesium alloy AZ31. In S. N. Mathaudhu, A. A. Luo, N. R. Neelameggham, E. A. Nyberg, & W. H. Sillekens (Eds.), Essential Readings in Magnesium Technology (pp. 345-349). Hoboken NJ USA: John Wiley & Sons. https://doi.org/10.1002/9781118859803.ch55
Chun, Y. B. ; Davies, C.H.J. / The evolution of in-grain misorientation axes (IGMA) during deformation of wrought magnesium alloy AZ31. Essential Readings in Magnesium Technology. editor / Suveen N. Mathaudhu ; Alan A. Luo ; Neale R. Neelameggham ; Eric A. Nyberg ; Wim H. Sillekens. Hoboken NJ USA : John Wiley & Sons, 2014. pp. 345-349
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abstract = "Understanding deformation mechanisms is a prerequisite for the development of more formable magnesium alloys. We have developed a novel approach based on analysis of in-grain misorientation axes which allows identification of the dominant slip system for a large number of grains. We investigated the effects of orientations and temperatures on active deformation mechanisms during the rolling of AZ31, including slip, deformation twinning and deformation banding. The IGMA analysis suggests that increasing rolling temperature promotes activation of prism slip which enhances the rollability of the plate favorably oriented for this slip mode. The approach also reveals an orientation-dependent occurrence of deformation banding and its crystallographic relationship with parent grain. It is concluded that IGMA analysis can be effectively used to study deformation mechanism in hcp metals, and can be used as a criterion for validating some crystal plasticity models.",
keywords = "Deformation bands, Deformation twinning, Electron back-scattering diffraction, In-grain misorientation axes (IGMA), Magnesium, Slip",
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Chun, YB & Davies, CHJ 2014, The evolution of in-grain misorientation axes (IGMA) during deformation of wrought magnesium alloy AZ31. in SN Mathaudhu, AA Luo, NR Neelameggham, EA Nyberg & WH Sillekens (eds), Essential Readings in Magnesium Technology. John Wiley & Sons, Hoboken NJ USA, pp. 345-349. https://doi.org/10.1002/9781118859803.ch55

The evolution of in-grain misorientation axes (IGMA) during deformation of wrought magnesium alloy AZ31. / Chun, Y. B.; Davies, C.H.J.

Essential Readings in Magnesium Technology. ed. / Suveen N. Mathaudhu; Alan A. Luo; Neale R. Neelameggham; Eric A. Nyberg; Wim H. Sillekens. Hoboken NJ USA : John Wiley & Sons, 2014. p. 345-349.

Research output: Chapter in Book/Report/Conference proceedingChapter (Book)Otherpeer-review

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AB - Understanding deformation mechanisms is a prerequisite for the development of more formable magnesium alloys. We have developed a novel approach based on analysis of in-grain misorientation axes which allows identification of the dominant slip system for a large number of grains. We investigated the effects of orientations and temperatures on active deformation mechanisms during the rolling of AZ31, including slip, deformation twinning and deformation banding. The IGMA analysis suggests that increasing rolling temperature promotes activation of prism slip which enhances the rollability of the plate favorably oriented for this slip mode. The approach also reveals an orientation-dependent occurrence of deformation banding and its crystallographic relationship with parent grain. It is concluded that IGMA analysis can be effectively used to study deformation mechanism in hcp metals, and can be used as a criterion for validating some crystal plasticity models.

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Chun YB, Davies CHJ. The evolution of in-grain misorientation axes (IGMA) during deformation of wrought magnesium alloy AZ31. In Mathaudhu SN, Luo AA, Neelameggham NR, Nyberg EA, Sillekens WH, editors, Essential Readings in Magnesium Technology. Hoboken NJ USA: John Wiley & Sons. 2014. p. 345-349 https://doi.org/10.1002/9781118859803.ch55