Institute of Physics of Materials AS CR, v. v. i. > Projects > Identification of fatigue damage mechanisms in modern steels under development for fusion and nuclear reactors
Identification of fatigue damage mechanisms in modern steels under development for fusion and nuclear reactors
| Investigator | Ing. Ivo Kuběna, Ph.D. |
| Number of Project | 13-28685P |
| Agency | Grantová agentura České republiky |
| Duration | 2013-01-31 - 2015-01-30 |
Anotace |
| An effort to improve efficiency of energetic devices by increasing of operating temperature leads to development of new materials which resist to creep and fatigue at elevated temperatures over long time. Recently, steels strengthened by oxide dispersion have come into focus. The main aim of this project is to obtain the newest ODS steels, to explain surface relief formation of these materials during cyclic loading, to determine a fatigue crack initiation mechanism and subsequently to measure kinetics of small fatigue crack growth, which allow a fatigue life prediction of components in service. The origination and evolution of surface relief will be studied by means of advanced electron microscopy techniques. Furthermore, basic fatigue curves will be measured and changes in microstructure due to cyclic plastic deformation will be studied. The expected result of the proposed project is a complex description of early stages of fatigue damage, which are decisive for fatigue resistance at elevated temperatures. This information is still missing in the literature. |
