Low-Energy Dislocation Structure (LEDS) character of dislocation boundaries aligned with slip planes in rolled aluminium

Grethe Winther, Chuanshi Hong, Xiaoxu Huang

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Abstract

For the specific slip geometry of two sets of coplanar systems (a total of four systems) in fcc metals, the range of dislocation networks in boundaries aligned with one of the two active slip planes is predicted from the Frank equation for boundaries free of long-range elastic stresses. Detailed comparison with experimental data for eight dislocation boundaries in cold-rolled aluminium grains of the 45° ND rotated Cube orientation is conducted. It is concluded that the boundaries are Low-Energy Dislocation Structures, which are in good agreement with the Frank equation while also lowering the energy by dislocation reactions. Cross slip plays a role in the boundary formation process.
Original languageEnglish
JournalPhilosophical Magazine
Volume95
Issue number13
Pages (from-to)1471-1489
ISSN1478-6435
DOIs
Publication statusPublished - 2015

Keywords

  • Dislocation boundaries
  • Dislocation theory
  • Dislocations
  • fcc crystal structure
  • Low-Energy Dislocation Structures
  • slip systems
  • Aluminum
  • Cold rolling
  • Crystal structure
  • Metal cladding
  • Cube orientation
  • Dislocation networks
  • Dislocation reactions
  • Formation process
  • Low energy dislocation structures
  • Slip system
  • Dislocations (crystals)

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