Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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A Study on Failure Analysis of Low Pressure Turbine Blade in Nuclear Plant using AFM

AFM을 이용한 발전소용 저압 터빈 블레이드의 파손해석에 관한 연구

  • 홍순혁 (동아대학교 대학원) ;
  • 최우성 (동아대학교 대학원) ;
  • 문성준 (삼척대학교 기계${\cdot}$정밀기계${\cdot}$자동차공학부) ;
  • 조석수 (삼척대학교 기계·정밀기계${\cdot}$자동차공학부) ;
  • 주원식 (동아대학교 기계${\cdot}$산업 시스템공학부)
  • Published : 2001.10.01
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Abstract

Turbine blade in nuclear plant is subject to cyclic bending fatigue by high steam pressure. Especially, fatigue fracture is caused by low stress below yielding stress. Photograph by SEM doesn't have striation but photograph by AFM has striation on the fatigue fractured surface of 12% Cr steel used in turbine blade. Surface roughness $R_q$ has the linear relation with respect to stress intensity factor range ΔK and is increased linearly according to load amplitude $\textit{\Delta}P$. In this study loading condition applied to turbine blade is predicted by the relation between the gradient of $R_q$ to $\textit{\Delta}K$ and load amplitude $\textit{\Delta}P$.

Keywords

References

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