Irradiation-induced Cu aggregations in Fe: An origin of embrittlement of reactor pressure vessel steels

Y. Nagai, Z. Tang, T. Kanai, M. Saneyasu, M. Hassegawa

研究成果: Article査読

205 被引用数 (Scopus)

抄録

Very dilute Fe-Cu systems, model alloys of nuclear reactor pressure vessel (RPV) steels, irradiated by fast neutrons, are studied by positron annihilation experiments and simple calculations. The ultrafine Cu precipitates, which are never, formed by thermal aging in the dilute alloys, are observed clearly and are strongly suggested to be responsible for irradiation-induced embrittlement of RPV steels. The formation and recovery process of the precipitates are revealed: (i) irradiation-induced Cu-vacancy complexes aggregate into microvoids; (ii) around 400°C the dissociation of vacancies from the microvoids leads to the formation of the Cu precipitates of about 1 nm in size; and (iii) the Cu precipitates anneal out at about 650°C.

本文言語English
論文番号134110
ページ(範囲)1341101-1341105
ページ数5
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
63
13
DOI
出版ステータスPublished - 2001

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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