Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Evaluations of Hydrogen Embrittlement Behaviours on Dissimilar Welding Part of SDS Bottles (I)

삼중수소 저장용기 이종용접부의 수소취화 거동 평가 (I)

  • Cho, Kyoungwon (Dept. of Advanced Materials Engineering, Chungbuk National Univ.) ;
  • Choi, Jaeha (Dept. of Advanced Materials Engineering, Chungbuk National Univ.) ;
  • Jang, Minhyuk (Dept. of Advanced Materials Science and Engineering, Korea National University of Transportation) ;
  • Lee, Youngsang (Dept. of Advanced Materials Science and Engineering, Korea National University of Transportation) ;
  • Hong, Taewhan (Dept. of Advanced Materials Science and Engineering, Korea National University of Transportation)
  • 조경원 (충북대학교 신소재 공학과) ;
  • 최재하 (충북대학교 신소재 공학과) ;
  • 장민혁 (한국교통대학교 신소재 공학과) ;
  • 이영상 (한국교통대학교 신소재 공학과) ;
  • 홍태환 (한국교통대학교 신소재 공학과)
  • Received : 2015.03.23
  • Accepted : 2015.04.30
  • Published : 2015.04.30
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Abstract

Nowdays, fossil fuels have been used as an important resource in development of industry. But it is limited and caused climate change such as pollution and global warming. So nuclear fusion research is being issued with tritium to develop eco-friendly and sustainable energy. Republic of Korea is in charge of Storage and Delivery System (SDS) in the International Thermonuclear Experimental Reactor (ITER), weld present in the SDS bottles are easily exposed to the hydrogen embrittlement of special characteristics of the hydrogen in hydrogen atmosphere, When the hydrogen embrittlement is rapidly progresses, the cracking is generated in the weld zone. Due to this cracking, the risk of leakage of tritium into the atmosphere occurs. In this study, hydrogen heat treatment was processed through the Pressure-Composition-Temperature (PCT) device according to the time variation. Also mechanical properties such as rupture strength test, three point bend test and hardness test in accordance with the respective time have been conducted and the fracture was observed by scanning electron microscopy(SEM) after the mechanical properties evaluation.

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References

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