Effect of low energy helium irradiation on mechanical properties of 304 stainless steel

T. Kawakami, K. Tokunaga, N. Yoshida

研究成果: Contribution to journalConference article査読

6 被引用数 (Scopus)


Mechanical properties of low energy He irradiated 304SS have been investigated by means of tensile test and nano-identation hardness tests. Specimen size is 2.8 mm × 5.4 mm × 0.1 mm in gauge and 12.4 mm in total length. Specimens are irradiated with 8 keV helium ions at R.T., 573 K and 873 K up to the fluence of 3 × 1021 He/m2. Tensile tests are performed on unirradiated and irradiated specimens at a strain rate of 3.33 × 10-3 s-1. In every irradiation condition, one specimen is tested to failure and the other two specimens are strained plastically to 10% and 20%. Formation of blisters with a diameter of about 500 nm is observed on the surface of tensile-tested specimens after R.T. irradiation. Some exfoliation of the blisters is also observed. When the irradiation temperature increases, a large number of cracks with a size of about several micrometers are formed on the surface together with exfoliation during the tensile test. The yield stress of specimens irradiated at R.T. and 573 K increases about 10% in comparison with that of the unirradiated specimen. The result of nano-indentation tests indicate that hardness near the surface increases depending on the irradiation temperature.

ジャーナルFusion Engineering and Design
81 A
出版ステータス出版済み - 2 2006
イベントProceedings of the Seventh International Symposium on Fusion Nuclear Technology ISFNT-7 Part A -
継続期間: 5 22 20055 27 2005

All Science Journal Classification (ASJC) codes

  • 土木構造工学
  • 原子力エネルギーおよび原子力工学
  • 材料科学(全般)
  • 機械工学


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