Specimen size effects on fracture toughness of JLF-1 reduced-activation ferritic steel

H. Ono, R. Kasada, A. Kimura

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47 Citations (Scopus)


Four different sizes of compact tension (CT) specimens of a reduced activation ferritic steel, JLF-1 steel, were fabricated and the fracture toughness was measured at room temperature by means of the unloading compliance method referring to in the ASTM E1820-99a. The JQ values obtained for the 1T-1CT and 1/2T-1CT specimens were 404 and 623 kJ/m2, respectively, indicating that the JQ value increased with decreasing the specimen thickness. On the other hand, the JQ value decreased when specimens were miniaturized while maintaining the similar proportions. The JQ values for the 1/2CT and 1/4CT specimens were 371 and 321 kJ/m2, respectively. Specimen size effects are interpreted in terms of an increase in the plain stress state region and plastic zone size at the crack tip in the specimen.

Original languageEnglish
Pages (from-to)1117-1121
Number of pages5
JournalJournal of Nuclear Materials
Issue number1-3 PART B
Publication statusPublished - 2004 Aug 1
Externally publishedYes
EventProceedings of the 11th Conference on Fusion Research - Kyoto, Japan
Duration: 2003 Dec 72003 Dec 12

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering


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