Subgrains analysis in α-uranium using combined TEM and single crystal plasticity theory

G. A. Frank, Roni Shneck, A. Landau, A. Venkert

Research output: Contribution to journalArticlepeer-review

Abstract

Subgrains formed in α-uranium during the β → α phase transformation are believed to be dislocation cells. According to this assumption, the large transformation strains give rise to plastic deformation. The dislocations taking part in the plastic deformation are arranged into dislocation boundaries. In order to check this preposition the yield surface of α-uranium at the transformation temperature and the stresses in a growing α particle have been calculated. Due to the low symmetry of α-uranium, only five slip systems are activated. This allows to find a unique solution for the relative activity of each slip system. Thus, the selection of active slip systems without ambiguity resulting form low crystallographic symmetry serves as an important advantageous property for the study of the fundamentals of plastic deformation. Structural TEM observations are in progress in order to gather experimental verification of the plasticity calculations.

Original languageEnglish
Pages (from-to)67-73
Number of pages7
JournalInterface Science
Volume10
Issue number1
DOIs
StatePublished - 1 Apr 2002

Keywords

  • Slip systems
  • Subgrains
  • Uranium
  • Yield surface

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Materials Science
  • Condensed Matter Physics

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