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http://dx.doi.org/10.9726/kspse.2015.19.5.045

Long-term Creep Life Prediction Methods of Grade 91 Steel  

Park, Jay-Young (Department of Mechanical Engineering, Pukyong Nat'l University)
Kim, Woo-Gon (Korea Atomic Energy Research Institute)
EKAPUTRA, I.M.W. (Department of Mechanical Engineering, Pukyong Nat'l University)
Kim, Seon-Jin (Department of Mechanical Engineering, Pukyong Nat'l University)
Jang, Jin-Sung (Korea Atomic Energy Research Institute)
Publication Information
Journal of Power System Engineering / v.19, no.5, 2015 , pp. 45-51 More about this Journal
Abstract
Grade 91 steel is used for the major structural components of Generation-IV reactor systems such as a very high temperature reactor (VHTR) and sodium-cooled fast reactor (SFR). Since these structures are designed for up to 60 years at elevated temperatures, the prediction of long-term creep life is very important to determine an allowable design stress of elevated temperature structural component. In this study, a large body of creep rupture data was collected through world-wide literature surveys, and using these data, the long-term creep life was predicted in terms of three methods: Larson-Miller (L-M), Manson-Haferd (M-H) and Wilshire methods. The results for each method was compared using the standard deviation of error. The L-M method was overestimated in the longer time of a low stress. The Wilshire method was superior agreement in the long-term life prediction to the L-M and M-H methods.
Keywords
Grade 91 Steel; Creep; Creep Life Prediction; Time-Temperature Parameter; Wilshire;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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