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Failure analysis of turbine blade in atomic power plant

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Abstract

The turbine blade in an atomic power plant may be fractured by fatigue, stress corrosion cracking and bad fitting. Especially, fatigue fracture is caused by low stress amplitude below the yielding stress. SEM fractography does not have striation, but AFM fractography does on the fatigue fractured surface of 12% Cr steel used for the turbine blade. Surface roughness R q measured by AFM is linearly related to the stress intensity factor range, ΔK, and is increased linearly according to the load range ΔP. Therefore, in this study, the loading condition applied to a turbine blade is predicted by the relation between the intersection of the ΔK-R q relation and load range ΔP.

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Authors and Affiliations

  1. Deptartment of Mechanical Engineering, Dong-A University, 840, Hadan2-dong, Saha-gu, Busan, 604-714, Korea

    Dong Woo Lee & Won Sik Joo

  2. Department of Vehicle Engineering, Kangwon National University, 253, Gyo-dong, Samcheok-si, Gangwon-do, 245-711, Korea

    Seok Swoo Cho

  3. Cooperative Laboratory Center, Pukyong National University, 100, Yongdang-dong, Nam-gu, Busan, 608-739, Korea

    Soon Hyeok Hong

Authors
  1. Dong Woo Lee
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  2. Seok Swoo Cho
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  3. Soon Hyeok Hong
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  4. Won Sik Joo
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Correspondence to Won Sik Joo.

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Lee, D.W., Cho, S.S., Hong, S.H. et al. Failure analysis of turbine blade in atomic power plant. J Mech Sci Technol 22, 864–870 (2008). https://doi.org/10.1007/s12206-008-0204-4

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  • DOI: https://doi.org/10.1007/s12206-008-0204-4

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