| About this Abstract |
| Meeting |
Materials Science & Technology 2011
|
| Symposium
|
Fatigue and Microstructure: A Symposium on Recent Advances
|
| Presentation Title |
Strip-Yield Modeling of Creep-Fatigue Crack Nucleation and Growth in Heat-Resistant Steels |
| Author(s) |
Gabriel Potirniche |
| On-Site Speaker (Planned) |
Gabriel Potirniche |
| Abstract Scope |
Heat resistant alloys are widely used in coal-fired power plants, as gas turbine materials for gas-fired power plants, or as reactor internals for nuclear power plants. The structural integrity of these materials must be well characterized at high temperatures. This research presents a modeling methodology used to understand and predict the service life and reliability of components experiencing creep and creep-fatigue damage. The proposed modeling methodology relies on a Strip-Yield Model (SYM). There are very few applications of the SYM approach to creep problems, as most applications are limited to fatigue and fracture problems. A SYM has been developed to predict crack incubation times and crack growth rates. Crack growth under creep and creep-fatigue loading is computed and compared for several steels used in high temperature applications. Various cracked specimen configurations are analyzed using the SYM, and comparison with experimental data from literature was performed and good agreement was obtained. |
| Proceedings Inclusion? |
Definite: A CD-only volume |