Effect of helium on fatigue crack growth and life of reduced activation ferritic/martensitic steel

Shuhei Nogami, Manabu Takahashi, Akira Hasegawa, Masanori Yamazaki

研究成果: Article査読

7 被引用数 (Scopus)

抄録

The effects of helium on the fatigue life, micro-crack growth behavior up to final fatigue failure, and fracture mode under fatigue in the reduced activation ferritic/martensitic steel, F82H IEA-heat, were investigated by low cycle fatigue tests at room temperature in air at a total strain range of 0.6-1.5%. Significant reduction of the fatigue life due to helium implantation was observed for a total strain range of 1.0-1.5%, which might be attributable to an increase in the micro-crack propagation rate. However, the reduction of fatigue life due to helium implantation was not significant for a total strain range of 0.6-0.8%. A brittle fracture surface (an original point of micro-crack initiation) and a cleavage fracture surface were observed in the helium-implanted region of fracture surface. A striation pattern was observed in the non-implanted region. These fracture modes of the helium-implanted specimen were independent of the strain range.

本文言語English
ページ(範囲)S43-S47
ジャーナルJournal of Nuclear Materials
442
1-3 SUPPL.1
DOI
出版ステータスPublished - 2013

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 材料科学(全般)
  • 原子力エネルギーおよび原子力工学

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