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Reliability assessment of creep rupture life for Gr. 91 steel
Highlights Statistical analysis of a number of creep rupture data based on Z parameter. Determination of the constant C in LM parameter and long-term creep life prediction. Generation of random variables for Zs and Zcr by Monte-Carlo simulation in a SCRI model. Examples for design application were reasonably drawn from the viewpoints of reliability.
Abstract This paper presents reliability assessment of the long-term creep life of Gr. 91 steel, which is a major structural material for high temperature structural components of Generation-IV reactor systems. A number of creep rupture data for Gr. 91 steel were collected through literature surveys, and the long-term creep life was predicted by Larson–Miller parameter. A “Z parameter” method was used to describe the magnitude of the deviation of the creep rupture data to a master curve. A “Service Condition-creep Rupture property Interference (SCRI) model” based on the Z parameter was used to simultaneously consider the scattering of the creep rupture data of materials and the fluctuations of service conditions in reliability assessment. A statistical analysis of the creep rupture data was conducted by the Z parameter. To carry out the SCRI model, a number of random variables for Zs describing service conditions and Zcr describing the dispersion of the creep rupture data were generated using a Monte-Carlo simulation technique. As examples for application, the creep rupture life under a certain service conditions of Gr. 91 steel was reasonably drawn from the viewpoints of reliability.
Reliability assessment of creep rupture life for Gr. 91 steel
Highlights Statistical analysis of a number of creep rupture data based on Z parameter. Determination of the constant C in LM parameter and long-term creep life prediction. Generation of random variables for Zs and Zcr by Monte-Carlo simulation in a SCRI model. Examples for design application were reasonably drawn from the viewpoints of reliability.
Abstract This paper presents reliability assessment of the long-term creep life of Gr. 91 steel, which is a major structural material for high temperature structural components of Generation-IV reactor systems. A number of creep rupture data for Gr. 91 steel were collected through literature surveys, and the long-term creep life was predicted by Larson–Miller parameter. A “Z parameter” method was used to describe the magnitude of the deviation of the creep rupture data to a master curve. A “Service Condition-creep Rupture property Interference (SCRI) model” based on the Z parameter was used to simultaneously consider the scattering of the creep rupture data of materials and the fluctuations of service conditions in reliability assessment. A statistical analysis of the creep rupture data was conducted by the Z parameter. To carry out the SCRI model, a number of random variables for Zs describing service conditions and Zcr describing the dispersion of the creep rupture data were generated using a Monte-Carlo simulation technique. As examples for application, the creep rupture life under a certain service conditions of Gr. 91 steel was reasonably drawn from the viewpoints of reliability.
Reliability assessment of creep rupture life for Gr. 91 steel
Kim, Woo-Gon (author) / Park, Jae-Young (author) / Kim, Seon-Jin (author) / Jang, Jinsung (author)
2013-05-07
7 pages
Article (Journal)
Electronic Resource
English
Reliability assessment of creep rupture life for Gr. 91 steel
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