Abstract
Creep failure of materials under service conditions strongly rely on the formation and growth of cavities, encouraging the characterization and modelling of the cavitation process. In the present work pre-existing pores from manufacturing process are investigated in 9Cr steel creep loaded for up to 9000 hours. Scanning electron microscopy (SEM) is used for 2D analysis while Computer tomography (CT) is employed for 3D exploration. Nearest neighbours distances in 3D are calculated from 2D measurements and are decreasing with creep exposure time. The pore growth is studied applying a physical growth model, and experimental results are compared with numerical simulation. From this research it is deduced that damage occurs by agglomeration and growth of pre-existing cavities. The developed model can predict the growth of pores as a function of temperature and load at service.
Original language | English |
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Title of host publication | 3DMS 2014 - Proceedings of the 2nd International Congress on 3D Materials Science |
Place of Publication | Hoboken, NJ, USA |
Publisher | John Wiley & Sons, Inc |
Pages | 85-90 |
Number of pages | 6 |
ISBN (Print) | 9781118945452 |
DOIs | |
Publication status | Published - 2014 |
Event | 2nd International Congress on 3D Materials Science, 3DMS 2014 - Annecy, France Duration: 29 Jun 2014 → 2 Jul 2014 |
Conference
Conference | 2nd International Congress on 3D Materials Science, 3DMS 2014 |
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Country/Territory | France |
City | Annecy |
Period | 29/06/14 → 2/07/14 |
Keywords
- Cavity growth
- Computed tomography
- Martensitic steel
- Modelling
- P91
ASJC Scopus subject areas
- Mechanics of Materials
- General Materials Science