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

H. Ono; R. Kasada; A. Kimura

doi:10.1016/j.jnucmat.2004.04.034

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

H. Ono, R. Kasada, A. Kimura

Research output: Contribution to journal › Conference article

42 Citations (Scopus)

Abstract

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 J_Q values obtained for the 1T-1CT and 1/2T-1CT specimens were 404 and 623 kJ/m², respectively, indicating that the J_Q value increased with decreasing the specimen thickness. On the other hand, the J_Q value decreased when specimens were miniaturized while maintaining the similar proportions. The J_Q 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 language	English
Pages (from-to)	1117-1121
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	329-333
Issue number	1-3 PART B
DOIs	https://doi.org/10.1016/j.jnucmat.2004.04.034
Publication status	Published - 2004 Aug 1
Externally published	Yes
Event	Proceedings of the 11th Conference on Fusion Research - Kyoto, Japan Duration: 2003 Dec 7 → 2003 Dec 12

ASJC Scopus subject areas

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

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Ono, H., Kasada, R., & Kimura, A. (2004). Specimen size effects on fracture toughness of JLF-1 reduced-activation ferritic steel. Journal of Nuclear Materials, 329-333(1-3 PART B), 1117-1121. https://doi.org/10.1016/j.jnucmat.2004.04.034

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abstract = "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.",

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AU - Ono, H.

AU - Kasada, R.

AU - Kimura, A.

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N2 - 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.

AB - 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.

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