Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Study on Creep Life Prediction by Initial Strain Method for Friction Welded Joints of Heat Resisting Steels

내열강 마찰용접재의 ISM에 의한 크리프 수명예측에 관한 연구

  • 김헌경 (부경대학교 대학원 기계공학과) ;
  • 김일석 (부경대학교 대학원 기계공학과) ;
  • 이연탁 (부경대학교 대학원 기계공학과) ;
  • 공유식 (부경대학교 기계공학부) ;
  • 오세규 (부경대학교 기계공학부)
  • Published : 2001.05.01
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Abstract

In this paper, the real-time prediction of high temperature creep life was carried out for the friction welded joints of dissimilar heat resisting steels (SUH3-SUH35). various life prediction method such as LMP (Larson_miller Parameter) and ISM (initial strain method) were applied. The creep behaviors of those steels and the welds under static load were examined by ISM combined with LMP at 500, 600 and $700^{\circ}C$, and the relationship between these two methods was investigated. A real-time creep lie (tr, hr) prediction equation by initial strain (${\varepsilon}_0$, %) under any creep stress ($\sigma$, MPa) at any high temperature (T, K) was developed as follows: $t_r={\alpha}{\varepsilon}_0^{\beta}{\sigma}^{-1}$ where, ${\phi}=16: {\alpha}=10^{51.412-0.104T+5.375{\times}10^5T^2}$, $ {\beta}=-83.989+0.180T-9.957{\times}10^{-5}T^2,{\phi}=20:$ ${\alpha}=10^{69.910-0.146T+7.744{\times}10^{-5}T^2$, ${\beta}=-51.442+0.105T-5.595{\times}10^{-5}T^2$ for SUH3-SUH35 friction weld of =16mm and 20mm, respectively.

Keywords

References

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