Creep behavior of an oxide dispersion strengthened iron with ultrafine grain structure

V. Dudko, R. Kaibyshev, A. Belyakov, Y. Sakai, Kaneaki Tsuzaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The creep behavior of oxide-bearing Fe-0.6%O steel was studied in the temperature range of 550-700°C at stresses ranging from 100 to 400 MPa. The creep data showed high values of an apparent stress exponent n close to ∼16 for power-law creep. In addition the apparent experimental activation energy was much higher than that for the lattice diffusion in a-iron. Analysis of creep data revealed that the deformation behavior was strongly affected by the threshold stresses, which are associated with the interaction between moving dislocations and fine incoherent oxide particles. Analysis of deformation behavior in terms of threshold stress leads the true stress exponent of ∼8; the activation energy for creep became close to value of activation energy for lattice diffusion at 700°C and for pipe-diffusion in the temperature range of 550-650°C.

Original languageEnglish
Title of host publicationTHERMEC 2009
Pages3194-3199
Number of pages6
DOIs
Publication statusPublished - Feb 9 2010
Externally publishedYes
Event6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009 - Berlin, Germany
Duration: Aug 25 2009Aug 29 2009

Publication series

NameMaterials Science Forum
Volume638-642
ISSN (Print)0255-5476

Other

Other6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009
CountryGermany
CityBerlin
Period8/25/098/29/09

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All Science Journal Classification (ASJC) codes

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

Cite this

Dudko, V., Kaibyshev, R., Belyakov, A., Sakai, Y., & Tsuzaki, K. (2010). Creep behavior of an oxide dispersion strengthened iron with ultrafine grain structure. In THERMEC 2009 (pp. 3194-3199). (Materials Science Forum; Vol. 638-642). https://doi.org/10.4028/www.scientific.net/MSF.638-642.3194