Small specimen test technique for evaluating fracture toughness of blanket structural materials

R. Kasada, H. Ono, A. Kimura

Research output: Contribution to journalConference articlepeer-review

13 Citations (Scopus)


Fracture toughness of blanket structural materials is one of the important material engineering properties to design structural components and evaluate the degradation during reactor operation. The present study showed that the master curve (MC) methodology to evaluate change in fracture toughness in the cleavage regime of a reduced-activation ferritic (RAF) steel before and after a thermal embrittlement treatment was applied by using sub-sized compact tension (CT) specimens. The reference temperature of MC for the JLF-1LN steel was estimated as -52 °C by using 1/2CT specimens. The shift of the reference temperature obtained by the MC methodology was judged to be somewhat larger than that of the ductile-brittle transition temperature shift obtained by the Charpy impact tests.

Original languageEnglish
Pages (from-to)981-986
Number of pages6
JournalFusion Engineering and Design
Issue number8-14 PART B
Publication statusPublished - 2006 Feb
Externally publishedYes
EventProceedings of the Seventh International Symposium on Fusion Nuclear Technology ISFNT-7 Part B -
Duration: 2005 May 222005 May 27


  • Blanket structural materials
  • Fracture toughness
  • Master curve
  • Reduced-activation ferritic steel
  • Small specimen test technique

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering


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