Suppression of Localized Plastic Flow in Irradiated Materials

Yinan Cui, Giacomo Po, Nasr Ghoniem

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Suppressing deformation localization caused by dislocation channels is crucial in the reliable service of irradiated materials. Through 3D Discrete Dislocation Dynamics simulations, the evolution of deformation localization extent is quantitatively studied, and the effect of internal dislocation structure and slip mode are revealed. Results show that to inhibit dislocation channel formation, the material is required to be pretreated so as to enhance short-range dislocation interactions. This can be attained by introducing a homogeneously dense dislocation structure before irradiation, and by loading along orientations that activate multiple slip systems. Implications for the design of radiation-resistant materials are discussed.

Original languageEnglish (US)
Pages (from-to)34-39
Number of pages6
JournalScripta Materialia
Volume154
DOIs
StatePublished - Sep 2018
Externally publishedYes

Keywords

  • Dislocation channels
  • Dislocation structure
  • Irradiation effects
  • Localized deformation
  • Slip mode

ASJC Scopus subject areas

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

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