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Vol.50, No.10, 721 ~ 729, 2012
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| Title |
| Reliability Evaluation on Creep Life Prediction of Alloy 617 for a Very High Temperature Reactor |
| 김우곤 Woo Gon Kim , 박재영 Jae Young Park , 김선진 Seon Jin Kim , 홍성덕 Sung Deok Hong , 김용완 Yong Wan Kim |
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| Abstract |
| This paper evaluates the reliability of creep rupture life under service conditions of Alloy 617, which is considered as one of the candidate materials for use in a very high temperature reactor (VHTR) system. A Z-parameter, which represents the deviation of creep rupture data from the master curve, was used for the reliability analysis of the creep rupture data of Alloy 617. A Service-condition Creep Rupture Interference (SCRI) model, which can consider both the scattering of the creep rupture data and the fluctuations of temperature and stress under any service conditions, was also used for evaluating the reliability of creep rupture life. The statistical analysis showed that the scattering of creep rupture data based on Z-parameter was supported by normal distribution. The values of reliability decreased rapidly with increasing amplitudes of temperature and stress fluctuations. The results established that the reliability decreased with an increasing service time. |
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| Key Words |
| Creep, Z parameter, Larson-Miller parameter, creep life, Monte-Carlo simulation |
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