Effect of helium implantation on mechanical properties and microstructure evolution of reduced-activation 9Cr-2W martensitic steel

R. Kasada, T. Morimura, A. Hasegawa, A. Kimura

研究成果: Article査読

24 被引用数 (Scopus)

抄録

A reduced-activation martensitic steel was implanted with helium up to 580 at. ppm by using 36 MeV α-beam between 353 and 423 K along with displacement damage up to 0.226 dpa. The implantation-induced increase in ductile-brittle transition temperature (DBTT) was estimated to be 98 K for the standard charpy V-notched (CVN) specimen implanted with 580 at. ppm He, through the conversion of small punch (SP) test results by an empirical relationship. It is clarified from comparison with neutron irradiation data that the increase in DBTT as well as implantation-induced hardening is interpreted simply in terms of displacement damage, suggesting that there is no significant effect of helium on both the irradiation hardening and the fracture toughness of the steel. No fracture mode change by the helium implantation was observed in the SP tests, showing a complete cleavage fracture mode in the lower shelf energy region.

本文言語English
ページ(範囲)83-89
ページ数7
ジャーナルJournal of Nuclear Materials
299
1
DOI
出版ステータスPublished - 2001 10

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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