Consideration of the oxide particle–dislocation interaction in 9Cr-ODS steel

Yuta Ijiri, N. Oono, S. Ukai, Hao Yu, S. Ohtsuka, Y. Abe, Y. Matsukawa

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The interaction between oxide particles and dislocations in a 9Cr-ODS ferritic steel is investigated by both static and in situ TEM observation under dynamic straining conditions and room temperature. The measured obstacle strength (α) of the oxide particles was no greater than 0.80 and the average was 0.63. The dislocation loops around some coarsened particles were also observed. The calculated obstacle strength by a stress formula of the Orowan interaction is nearly equaled to the average experimental value. Not only cross-slip system but also the Orowan interaction should be considered as the main interaction mechanism between oxide particles and dislocation in 9CrODS ferritic steel.

Original languageEnglish
Pages (from-to)1047-1056
Number of pages10
JournalPhilosophical Magazine
Volume97
Issue number13
DOIs
Publication statusPublished - 2017 May 3

Keywords

  • ODS ferritic steel
  • dislocation-obstacle interaction
  • dispersion strengthening
  • in situ TEM straining experiments
  • obstacle strength
  • oxide particles

ASJC Scopus subject areas

  • Condensed Matter Physics

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