Proceedings of the Korea Committee for Ocean Resources and Engineering Conference (한국해양공학회:학술대회논문집)

Korean Society of Ocean Engineers (한국해양공학회)
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Effect of specimen size on fracture toughness of reduced activation ferritic steel (JLF-l)

저방사화 철강재 (JLF-1)의 파괴인성에 미치는 시험편 크기의 영향

  • Kim, Dong-Hyun (Graduate School of Mechanical Engineering, Dong-Eui Univ.) ;
  • Yoon, Han-Ki (Division of Mechanical-Information and Industrial Engineering, Dong-Eui Univ.) ;
  • Park, Won-Jo (School of Mechanical and Aerospace Engineering, Gyengsang National Univ.) ;
  • Katoh, Y. (Institute of Advanced Energy, Kyoto Univ.) ;
  • Kohyama, A. (Institute of Advanced Energy, Kyoto Univ.)
  • 김동현 (동의대학교 대학원 기계공학과) ;
  • 윤한기 (동의대학교 기계.정보산업공학부) ;
  • 박원조 (경상대학교 기계항공공학부) ;
  • ;
  • Published : 2003.05.23
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Abstract

Reduced activation ferritic (JLF-1) steel is leading candidates for blanket/first-wall structures of the D-T fusion reactor. In fusion application, structural materials will suffer effects of repeated changes of temperature. Therefore, the data base of tensile strength and fracture toughness at operated temperature $400^{\circ}C$ are very important. Fracture toughness ($J_{IC}$) and tensile tests were carried out at room temperature and elevated temperature ($400^{\circ}C$). Fracture toughness tests were performed with two type size to investigate the relationship between the constraint effect of a size and the fracture toughness resistance curve. As the results, the tensile strength and the fracture toughness values of the JLF-1 steel are slightly decreased with increasing temperature. The fracture resistance curve increased with increasing plane size and decreased with increasing thickness. The fracture toughness values of JLF-1 steel at room temperature and at $400^{\circ}C$ shows an excellent fracture toughness ($J_{IC}$) of about $530kJ/m^2\;and\;340kJ/m^2$, respectively.

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