Strength and fracture toughness of reduced - activation ferritic steel (JLF-1) for fusion reactor application

핵융합로용 저방사화 철강재료(JLF-1)의 강도와 파괴인성

  • 윤한기 (동의대학교 기계공학과) ;
  • 김동현 (동의대학교 대학원 기계공학과) ;
  • 이상필 (동의대학교 기계공학과) ;
  • 박이현 (동의대학교 대학원 기계공학과) ;
  • 공유식 (동의대학교 산업기술개발 연구소) ;
  • ;
  • Published : 2003.04.23

Abstract

Reduced activation ferritic steel, JLF-1 steel (Fe-9Cr-2W-V-Ta), is one of the promising candidate materials for fusion reactor applications. Fracture toughness ($J_IC$) and tensile tests were carried out at room temperature and elevated temperature ($400^{\circ}C$). Two types of CT specimen were prepared to examine the effect of rolling direction on the fracture toughness of JLF-1 steel. Four types of tensile specimen were also prepared to investigate the property by the rolling direction and welding. The Micro Vickers hardness was measured at various distances of a cross section of the TIG joints of JLF-1 steel according to the heating history of each position. Finally, the fracture surface was observed by scanning electron microscopy (SEM).

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