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An Empirical Approach to Analyze Creep Rupture Behavior of P91 Steel
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Date
2021-05-01
Author
Aslam, Muhammad Junaid
Gür, Cemil Hakan
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P91 steel has been a highly researched material because of its applicability for high-temperature applications. Considerable efforts have been made to produce experimental creep data and develop models for creep life prediction. As creep tests are expensive and difficult to conduct, it is vital to develop authenticated empirical methods from experimental results that can be utilized for better understanding of creep behavior and can be incorporated into computational models for reliable prediction of creep life. In this research, a series of creep rupture tests are performed on the P91 specimens within a stress range of 155 MPa to 200 MPa and temperature range of 640 oC (913 K) to 675 oC (948 K). The microstructure, hardness, and fracture surfaces of the specimens are investigated. To analyze the results of the creep rupture tests at a macro level, a parameter called creep work density is derived. Then, the relationships between various creep parameters such as strain, strain rate, time to rupture, creep damage tolerance factor, and creep work density are investigated, and various empirical equations are obtained.
Subject Keywords
Creep damage
,
Creep life
,
Creep work density
,
P91 Type 2 steel
,
Strain energy density
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85108829587&origin=inward
https://hdl.handle.net/11511/91272
Journal
Korean Journal of Materials Research
DOI
https://doi.org/10.3740/mrsk.2021.31.5.255
Collections
Department of Metallurgical and Materials Engineering, Article
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M. J. Aslam and C. H. Gür, “An Empirical Approach to Analyze Creep Rupture Behavior of P91 Steel,”
Korean Journal of Materials Research
, pp. 255–263, 2021, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85108829587&origin=inward.