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 |
|---|---|
| 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 |
|---|---|
| Country | France |
| City | Annecy |
| Period | 29/06/14 → 2/07/14 |
Fingerprint
Keywords
- Cavity growth
- Computed tomography
- Martensitic steel
- Modelling
- P91
ASJC Scopus subject areas
- Mechanics of Materials
- Materials Science(all)
Cite this
Investigation of pre-existing pores in creep loaded 9Cr steel. / Yadav, Surya Deo; Rosc, Joerdis; Sartory, Bernhard; Brunner, Roland; Sonderegger, Bernhard; Sommitsch, Christof; Poletti, Maria Cecilia.
3DMS 2014 - Proceedings of the 2nd International Congress on 3D Materials Science. Hoboken, NJ, USA : John Wiley & Sons, Inc, 2014. p. 85-90.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
}
TY - GEN
T1 - Investigation of pre-existing pores in creep loaded 9Cr steel
AU - Yadav, Surya Deo
AU - Rosc, Joerdis
AU - Sartory, Bernhard
AU - Brunner, Roland
AU - Sonderegger, Bernhard
AU - Sommitsch, Christof
AU - Poletti, Maria Cecilia
PY - 2014
Y1 - 2014
N2 - 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.
AB - 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.
KW - Cavity growth
KW - Computed tomography
KW - Martensitic steel
KW - Modelling
KW - P91
UR - http://www.scopus.com/inward/record.url?scp=84920037024&partnerID=8YFLogxK
U2 - 10.1002/9781118990278.ch14
DO - 10.1002/9781118990278.ch14
M3 - Conference contribution
SN - 9781118945452
SP - 85
EP - 90
BT - 3DMS 2014 - Proceedings of the 2nd International Congress on 3D Materials Science
PB - John Wiley & Sons, Inc
CY - Hoboken, NJ, USA
ER -