Exploring the Limit of Dislocation Based Plasticity in Nanostructured Metals

D. A. Hughes, Niels Hansen

Research output: Contribution to journalJournal articlepeer-review

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Abstract

A twofold decrease to an unexplored scale of 5 nm was produced in Cu by applying a large sliding load in liquid nitrogen. Statistical and universal scaling analyses of deformation induced high angle boundaries, dislocation boundaries, and individual dislocations observed by high resolution electron microscopy reveal that dislocation processes still dominate. Dislocation based plasticity continues far below the transition suggested by experiment and molecular dynamics simulations, with a limit below 5 nm. Very high strength metals may emerge based on this enhanced structural refinement.
Original languageEnglish
Article number135504
JournalPhysical Review Letters
Volume112
Issue number13
Number of pages5
ISSN0031-9007
DOIs
Publication statusPublished - 2014

Keywords

  • High resolution electron microscopy
  • Molecular dynamics
  • Structural metals
  • Dislocation boundaries
  • High angle boundaries
  • High strength
  • Large sliding
  • Molecular dynamics simulations
  • Nanostructured metals
  • Structural refinement
  • Universal scaling
  • Plasticity

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