Investigation of Pre-Existing Pores in Creep Loaded 9Cr Steel View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

2014

AUTHORS

Surya Deo Yadav , Joerdis Rosc , Bernhard Sartory , Roland Brunner , Bernhard Sonderegger , Christof Sommitsch , Cecilia Poletti

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. More... »

PAGES

85-90

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-3-319-48123-4_14

DOI

http://dx.doi.org/10.1007/978-3-319-48123-4_14

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1015274116


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