Twinning behavior of pure magnesium quantitatively investigated by acoustic emission

Yunping Li, Manabu Enoki

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We used acoustic emission to quantitatively investigate the effects of grain size and strain rate on the twinning behavior of pure magnesium during compression. In a sample with a grain size of 35μm and a strain rate of 1.67×10 -4s -1, the true strain dependence of the twinning size distribution showed that twins form within a grain below a strain of approximately 0.5% and propagate to adjacent grains at higher strain levels. The twinning strain e{open} tw, which is the strain associated with the twin formation, was calculated by considering the variation in the Schmidt factor during the deformation process. An exponential relation was determined between e{open} tw and the cumulative AE counts (N) for samples with different grain sizes and strain rates at the initial stage of the compression process.

Original languageEnglish
Pages (from-to)8-13
Number of pages6
JournalMaterials Science and Engineering A
Volume536
DOIs
Publication statusPublished - 2012 Feb 28

Keywords

  • Acoustic emission
  • Cumulative AE counts
  • Pure magnesium
  • Twinning
  • Twinning strain

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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