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Creep-fatigue crack behaviour of a mod. 9Cr-1Mo steel structure with weldments

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Abstract

An assessment of a creep-fatigue crack initiation and growth for a Mod. 9Cr-1Mo steel structure with weldments has been carried out based on an extended French RCC-MR A16 procedure. The A16 defect assessment guide provides assessment procedures for a creep-fatigue crack initiation and growth for an austenitic stainless steel, but no guidelines are available yet for a Mod. 9Cr-1Mo steel. A creep-fatigue structural test was carried out for a Mod. 9Cr-1Mo specimen with two hours of a hold time at 873 K and various primary nominal stresses. σ d approach was employed to evaluate a creep-fatigue crack initiation, and an assessment of a creep-fatigue crack growth at a defect has also been carried out. The evaluation results were compared with the observed images from the structural test.

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Authors and Affiliations

  1. Atomic Energy Research Institute, 1045 Daeduk-daero, Yusong-gu, Daejeon, 305-353, Republic of Korea

    Hyeong-Yeon Lee, Jong-Bum Kim, Woo-Gon Kim & Jae-Han Lee

Authors
  1. Hyeong-Yeon Lee
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  2. Jong-Bum Kim
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  3. Woo-Gon Kim
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  4. Jae-Han Lee
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Correspondence to Hyeong-Yeon Lee.

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Lee, HY., Kim, JB., Kim, WG. et al. Creep-fatigue crack behaviour of a mod. 9Cr-1Mo steel structure with weldments. Trans Indian Inst Met 63, 245–250 (2010). https://doi.org/10.1007/s12666-010-0033-x

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  • DOI: https://doi.org/10.1007/s12666-010-0033-x

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