Diffusivity and solubility of Cu in a reactor pressure vessel steel studied by atom probe tomography

Masaki Shimodaira, Takeshi Toyama, Fumihiko Takahama, Naoki Ebisawa, Yasuko Nozawa, Yasuo Shimizu, Koji Inoue, Yasuyoshi Nagai

研究成果: Article査読

1 被引用数 (Scopus)

抄録

The diffusivity and solubility limit of Cu in A533B steel, which is used in reactor pressure vessels, were studied by atom probe tomography (APT). Cu-A533B steel diffusion couples were annealed at temperatures of 550, 600, and 700°C, and the resulting Cu concentration profiles were measured. At the temperature of 700°C, the diffusivity of Cu in A533B steel was about 3 times higher than that in pure Fe, whereas at the temperature of 550°C, the diffusivity of Cu in A533B steel is almost closer to that in pure Fe. The solubility limit of Cu in A533B steel was similar to pure Fe. APT was also used to study the effect of the grain boundary (GB) diffusion. The results indicated that no Cu segregation occurred at GB near the Cu/A533B steel interface, which may imply that GB diffusion of Cu was not effective in A533B steel.

本文言語English
ページ(範囲)1513-1516
ページ数4
ジャーナルMaterials Transactions
56
9
DOI
出版ステータスPublished - 2015

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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