Creep Tests and Modeling Based on Continuum Damage Mechanics for T91 and T92 Steels

9-11%Cr ferritic steels play an important role in high-temperature and high-pressure boilers of advanced power plants. In this paper, a continuum damage mechanics (CDM)-based creep model was proposed to study the creep behavior of T91 and T92 steels at high temperatures. Long-time creep tests were p...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-12, Vol.281 (1), p.12026
Main Authors: Pan, J P, Tu, S H, Zhu, X W, Tan, L J, Hu, B, Wang, Q
Format: Article
Language:English
Subjects:
Boilers
Continuum damage mechanics
Creep tests
Ferritic stainless steels
Heat resistant steels
High temperature
Martensitic stainless steels
Power plants
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Summary:9-11%Cr ferritic steels play an important role in high-temperature and high-pressure boilers of advanced power plants. In this paper, a continuum damage mechanics (CDM)-based creep model was proposed to study the creep behavior of T91 and T92 steels at high temperatures. Long-time creep tests were performed for both steels under different conditions. The creep rupture data and creep curves obtained from creep tests were captured well by theoretical calculation based on the CDM model over a long creep time. It is shown that the developed model is able to predict creep data for the two ferritic steels accurately up to tens of thousands of hours.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/281/1/012026