Grain boundary self-diffusion in directionally solidified equiatomic Fe-Co alloy

Hiroyuki Nitta, Yoshiaki Iijima, Kazumi Tanaka, Yoshihiro Yamazaki, Chan Gyu Lee, Takashi Matsuzaki, Tadao Watanabe

研究成果: ジャーナルへの寄稿学術誌査読

11 被引用数 (Scopus)

抄録

Grain boundary diffusivities of 59Fe and 57Co in a binary Fe-50 at.%Co alloy have been determined at a temperature range between 883 and 1123 K by serial sputter-microsectioning technique using specimen unidirectionally solidified at three different solidification rates of 12000, 60 and 32 mm/h. Above the order-disorder transformation temperature of 1003 K, the Arrhenius plots of the grain boundary diffusivities in the alloy solidified at three rates show straight lines. The diffusivities in the specimen with 32 mm/h are higher than those with 60 and 12000 mm/h. Below 1003 K, all the Arrhenius plots of the diffusivities show downward curvature remarkably owing to the atomic ordering. From the analysis of depth profiles, the atomic ordering gives large influence on the diffusion along subgrain boundaries rather than the diffusion along random grain boundaries.

本文言語英語
ページ(範囲)250-256
ページ数7
ジャーナルMaterials Science and Engineering A
382
1-2
DOI
出版ステータス出版済み - 9月 25 2004
外部発表はい

!!!All Science Journal Classification (ASJC) codes

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

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