De-twinning via secondary twinning in face-centered cubic alloys

Y. Cao, Y. B. Wang, Z. B. Chen, X. Z. Liao, M. Kawasaki, S. P. Ringer, T. G. Langdon, Y. T. Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

38 Citations (Scopus)


We report a de-twinning process via secondary twinning in face-centred cubic structures with low stacking fault energies. A duplex stainless steel was deformed using high-pressure torsion. Primary twins with an average twin boundary (TB) spacing of ~7. nm formed in the early stages of the deformation and this was followed by secondary twinning. The partial dislocations from the secondary twinning subsequently interacted with the primary TBs, leading to the de-twinning of the primary twins. As a result of the de-twinning process, the secondary twins with an average TB spacing of ~1.7. nm reached a maximum length of ~200. nm.

Original languageEnglish
Pages (from-to)110-114
Number of pages5
JournalMaterials Science and Engineering A
Publication statusPublished - 20 Aug 2013
Externally publishedYes


  • De-twinning
  • Severe plastic deformation
  • Steel
  • Transmission electron microscopy
  • Twinning

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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