Evolution of dislocation loops in annealed iron pre-irradiated with hydrogen ion in high-voltage electron microscope

Jin Gao, Yufeng Du, Somei Ohnuki, Farong Wan

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The nature of dislocation loops in the annealed pure iron pre-irradiated with hydrogen ion at room temperature was studied by the evolution of loops under electron irradiation in high-voltage electron microscope (HVEM). Only interstitial-type loops were observed when annealed and electron irradiated at 350 °C but only vacancy-type loops formed at temperature higher than 500 °C. When annealed at temperatures from 450 °C to 490 °C, both interstitial-type and vacancy-type loops formed simultaneously in the specimen and vacancy-type loops accounted for an increasing fraction with increasing annealing temperature, from 28.5% at 450 °C to 55% at 490 °C. The bias factor of interstitial-type and vacancy-type loops was compared based on the growth rate or shrinkage rate of the dislocation loops. The bias factor of interstitial-type loops was demonstrated to be higher than that of vacancy-type loops at all three annealing temperatures.

Original languageEnglish
Pages (from-to)81-87
Number of pages7
JournalJournal of Nuclear Materials
Volume481
DOIs
Publication statusPublished - 2016 Dec 1
Externally publishedYes

Keywords

  • Bias factor
  • High-voltage electron microscope
  • Interstitial-type loops
  • Vacancy-type loops

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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