In situ TEM observation of dislocation movement through the ultrafine obstacles in an Fe alloy

K. Nogiwa, T. Yamamoto, K. Fukumoto, H. Matsui, Yasuyoshi Nagai, Kunio Yubuta, M. Hasegawa

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Dislocation movement through ultrafine obstacles in a thermally aged Fe-Cu alloy has been studied by in situ transmission electron microscope observation. A very effective technique for quantitative estimates of radiation embrittlement is proposed. The obstacle strength has been estimated from the critical bow-out angle, φ, of dislocations. The increase in shear stress, which is estimated from the averaged strength of ultrafine obstacles and the averaged distance between the two neighboring obstacles on a dislocation in the in situ observation, is in good agreement with the hardening obtained from macroscopic mechanical tests. This technique is very useful to predict the mechanical properties of irradiated fusion and fission reactor materials from the microstructure obtained from experimental observations and/or the computer simulations.

Original languageEnglish
Pages (from-to)946-950
Number of pages5
JournalJournal of Nuclear Materials
Volume307-311
Issue number2 SUPPL.
DOIs
Publication statusPublished - 2002 Dec 1

ASJC Scopus subject areas

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

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