Characterization and modeling of {101¯2} twin banding in magnesium

Yub Raj Paudel, Joseph Indeck, Kavan Hazeli, Matthew W. Priddy, Kaan Inal, Hongjoo Rhee, Christopher D. Barrett, Wilburn R. Whittington, Krista R. Limmer, Haitham El Kadiri

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We experimentally and numerically examined the localization behavior of {101¯2} extension twins in strongly and weakly textured AZ31 and ZEK100 magnesium alloys as they depart from the surface toward the center of the sheet under the mechanical action of three-point bending. Strain measurement analysis using digital image correlation revealed that twin banding occurs only in the sharply textured AZ31, but with a characteristic spacing between the bands which decreases with the twin height and applied strain. ZEK100 did not exhibit any ordered localization of bands and behaved as a “true” polycrystal. This finding is in agreement with micromechanical calculations by the present authors. We show that full-field plasticity finite element crystal plasticity model was unable to capture many important 2D features of the twin banding. This suggest that twin shear transfer, non-local effects, and the third dimension effects should be included into this model.

Original languageEnglish (US)
Pages (from-to)438-451
Number of pages14
JournalActa Materialia
Volume183
DOIs
StatePublished - Jan 15 2020
Externally publishedYes

Keywords

  • CPFEM
  • HCP
  • Magnesium alloy
  • Twin bands
  • Twinning

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Fingerprint

Dive into the research topics of 'Characterization and modeling of {101¯2} twin banding in magnesium'. Together they form a unique fingerprint.

Cite this