Radiation resistance of oxide dispersion strengthened alloys: Perspectives from in situ observations and rate theory calculations

Xiang Liu, Yinbin Miao, Meimei Li, Marquis A. Kirk, Guangming Zhang, Shigeharu Ukai, Stuart A. Maloy, James F. Stubbins

Research output: Contribution to journalArticlepeer-review

Abstract

Here, in situ ion irradiation and rate theory calculations were employed to directly compare the radiation resistance of an oxide dispersion strengthened alloy with that of a conventional ferritic/martensitic alloy. Compared to the rapid buildup of dislocation loops, loop growth, and formation of network dislocations in the conventional ferritic/martensitic alloy, the superior radiation resistance of the oxide dispersion strengthened alloy is manifested by its stable dislocation structure under the same irradiation conditions. The results are consistent with rate theory calculations, which show that high-density nanoparticles can significantly reduce freely migrating defects and suppress the buildup of clustered defects.

Original languageEnglish (US)
Pages (from-to)33-36
Number of pages4
JournalScripta Materialia
Volume148
DOIs
StatePublished - Apr 15 2018

Keywords

  • Dislocation structure
  • Microstructure
  • Oxide dispersion strengthened (ODS) alloy
  • Radiation enhanced diffusion (RED)
  • Transmission electron microscopy

ASJC Scopus subject areas

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

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