Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Long-term Creep Life Prediction Methods of Grade 91 Steel

Grade 91 강의 장시간 크리프 수명 예측 방법

  • Park, Jay-Young (Department of Mechanical Engineering, Pukyong Nat'l University) ;
  • Kim, Woo-Gon (Korea Atomic Energy Research Institute) ;
  • EKAPUTRA, I.M.W. (Department of Mechanical Engineering, Pukyong Nat'l University) ;
  • Kim, Seon-Jin (Department of Mechanical Engineering, Pukyong Nat'l University) ;
  • Jang, Jin-Sung (Korea Atomic Energy Research Institute)
  • 박재영 (부경대학교 기계설계공학과) ;
  • 김우곤 (한국원자력연구원 원자력소재개발부) ;
  • ;
  • 김선진 (부경대학교 기계설계공학과) ;
  • 장진성 (한국원자력연구원 원자력소재개발부)
  • Received : 2015.07.28
  • Accepted : 2015.08.17
  • Published : 2015.10.31
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Abstract

Grade 91 steel is used for the major structural components of Generation-IV reactor systems such as a very high temperature reactor (VHTR) and sodium-cooled fast reactor (SFR). Since these structures are designed for up to 60 years at elevated temperatures, the prediction of long-term creep life is very important to determine an allowable design stress of elevated temperature structural component. In this study, a large body of creep rupture data was collected through world-wide literature surveys, and using these data, the long-term creep life was predicted in terms of three methods: Larson-Miller (L-M), Manson-Haferd (M-H) and Wilshire methods. The results for each method was compared using the standard deviation of error. The L-M method was overestimated in the longer time of a low stress. The Wilshire method was superior agreement in the long-term life prediction to the L-M and M-H methods.

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References

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