Three dimensional atom probe observations of reactor pressure vessel model alloys irradiated by neutrons and heavy Ions

Kenji Dohi, Kenji Nishida, Akiyoshi Nomoto, Naoki Soneda, Hideo Watanabe

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Microstructural characterization of reactor pressure vessel mode alloys irradiated by neutrons and Fe-ions was performed using three-dimensional atom probe tomography. Ultra-fine clusters of solute atoms, such as Cu, Ni, Mn and Si, with diameter in the range of 2-3 nm were formed at high number density in all the alloys. The cluster number density and the mean diameter of the alloys irradiated by Fe-ion were higher and smaller, respectively, than those of neutron-irradiated alloys. The clusters in Feion irradiated alloys had less Cu and more Ni and Si content than those of neutron irradiated alloys. The increase in hardness of both irradiated alloys had almost linear correlation with the square root of the volume fraction of solute atom clusters.

Original languageEnglish
Pages (from-to)191-198
Number of pages8
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume74
Issue number3
DOIs
Publication statusPublished - Mar 2010

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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