Kim, Seen Chan Shim, Jae-Hyeok Jung, Woo-Sang Choi, Yoon Suk 2024-01-19T20:03:40Z 2024-01-19T20:03:40Z 2021-09-02 2019-05 1598-9623 https://pubs.kist.re.kr/handle/201004/120045 Long-term creep life (5000-100,000 h) predictabilities, based on the short-term creep life data (similar to 5000 h), for Grade 92 steel were investigated among major creep life prediction models, Larson-Miller parameter (LMP), normalized power law (NPL) and Wilshire models. The NPL and Wilshire models showed superior short-term creep data based long-term creep life predictabilities to the LMP model. In particular, the Wilshire model showed relatively accurate predictions (within an error range of 7%-10%), which seemed to be due to reasonable coupling of the normalized stress with the temperature-dependent rupture life term in a form of the cumulative distribution function. Both NPL and Wilshire models, calibrated by the short-term creep life data, showed a transition in creep mechanism at a similar normalized stress. Thermodynamics-based kinetic simulation (MatCalc (TM)) results for major precipitates (M23C6, MX and Z phases) of Grade 92 steel suggested that the creep transition is associated with coarsening of M23C6 precipitates at high temperatures (above 600 degrees C), which led to the degradation of the creep property. English KOREAN INST METALS MATERIALS RUPTURE BEHAVIOR FRACTURE PREDICTION EVOLUTION EQUATIONS STRENGTH KINETICS P92 Short-Term Creep Data Based Long-Term Creep Life Predictability for Grade 92 Steels and Its Microstructural Basis Article 10.1007/s12540-018-00214-x 1 METALS AND MATERIALS INTERNATIONAL, v.25, no.3, pp.713 - 722 METALS AND MATERIALS INTERNATIONAL 25 3 713 722 scie scopus kci ART002463057 000464215000017 2-s2.0-85056889903 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article RUPTURE BEHAVIOR FRACTURE PREDICTION EVOLUTION EQUATIONS STRENGTH KINETICS P92 Short-term creep life Long-term creep life Precipitates Simulations Grade 92 steel