The microstructure of laser welded V-4Cr-4Ti alloy after ion irradiation

H. Watanabe, M. Nagamine, K. Yamasaki, N. Yoshida, Nam Jin Heo, T. Nagasaka, T. Muroga

研究成果: ジャーナルへの寄稿会議記事査読

6 被引用数 (Scopus)

抄録

Laser welded high purity V-4Cr-4Ti alloy (NIFS-HEAT2), fabricated by National Institute for Fusion Science (NIFS), was used for this study. Copper ion irradiation was carried out with the tandem accelerator at Kyushu University. The TEM samples were sliced from the welded materials and irradiated at 573 and 873K up to the dose of 12 dpa. The microstructure before irradiation showed that relatively large precipitates, which were commonly observed in NIFS-HEAT2, disappeared in the center of the weld metal. After the ion irradiation, fine titanium oxides with {100} habit planes were detected even at the dose of 0.75 dpa. However, less number density of these oxides were observed in the base metal after the same irradiation conditions. This means that the behaviors of oxygen atoms, which dissolved from the large precipitates during the laser welding, is essential to the micro structural evolution of welded V-4Cr-4Ti alloys.

本文言語英語
ページ(範囲)1491-1496
ページ数6
ジャーナルMaterials Science Forum
475-479
II
DOI
出版ステータス出版済み - 2005
イベントPRICM 5: The Fifth Pacific Rim International Conference on Advanced Materials and Processing - Beijing, 中国
継続期間: 11月 2 200411月 5 2004

!!!All Science Journal Classification (ASJC) codes

  • 材料科学一般
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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