3D analysis of fatigue crack propagation in cast irons using synchrotron X-ray tomography and 3D-XRD
| Reference number | |
| Coordinator | RISE Research Institutes of Sweden AB - RISE Safety, Borås |
| Funding from Vinnova | SEK 500 000 |
| Project duration | November 2018 - November 2019 |
| Status | Completed |
| Venture | Research infrastructure - utilisation and collaboration |
| Call | Research infrastructure - utilisation and collaboration: Industrial pilot projects for neutron and photon experiments at large scale research infrastructures - 2018 |
| End-of-project report | 2018-04403_Scania.pdf (pdf, 232 kB) |
Important results from the project
The main goal of the project was to study fatigue cracks in industrially relevant cast irons during mechanical loading using synchrotron radiation microtomography. Since it is difficult to realize a fatigue loading cycle at a synchrotron facility a sub goal was to develop a lab-based method for introduction of fatigue cracks. Both of these goals have been fulfilled within the Project.
Expected long term effects
In total, 140 3D-images were obtained, during a five-day period of granted academic beamtime, at the Swedish beamline P21 at DESY in Hamburg. The studied specimens all had internal fatigue cracks which were introduced using the aforementioned method. These cracks were imaged during mechanical loading to be able to study their behavior in terms of opening/closing and propagation in relation to the microstructure. This data deepens the understanding for fatigue cracks for this group of materials.
Approach and implementation
The project followed the original test plan. Test specimens were manufactured from industrially relevant raw material supplied by Scania and then subjected to fatigue loading to introduce fatigue cracks without rupturing the specimens. The behavior of these cracks was then studied during mechanical loading at a synchrotron radiation facility (P21, DESY). A streamlined workflow has been developed allowing for new ways to understand fatigue induced cracks in relation to the microstructure.