Electron backscattering diffraction analysis of secondary cleavage cracks in a reactor pressure vessel steel

An analysis of secondary cleavage cracks in the A 508 C1.3 bainitic steel has been carried out using electron backscattering diffraction (EBSD) and scanning electron microscopy (SEM). The crystallographic orientation in the vicinity of the secondary cracks was studied. Secondary cleavage crack propa...

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Bibliographic Details
Published in:Materials characterization 2002-10, Vol.49 (3), p.211-217
Main Authors: Nohava, J, Haušild, P, Karlı́k, M, Bompard, P
Format: Article
Language:English
Subjects:
Applied sciences
BACKSCATTERING
BAINITE
Bainitic steel
CARBIDES
CLEAVAGE
CRACK PROPAGATION
CRACKS
CRYSTALLOGRAPHY
EBSD
ELECTRON DIFFRACTION
Exact sciences and technology
FRACTURES
MATERIALS SCIENCE
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
ORIENTATION
PRESSURE VESSELS
SCANNING ELECTRON MICROSCOPY
Secondary cleavage crack
SEM
STEELS
SURFACES
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Summary:An analysis of secondary cleavage cracks in the A 508 C1.3 bainitic steel has been carried out using electron backscattering diffraction (EBSD) and scanning electron microscopy (SEM). The crystallographic orientation in the vicinity of the secondary cracks was studied. Secondary cleavage crack propagation planes were identified to be {100}, {110}, {112} and {123}. The secondary cracks propagated mostly in the range of one crystallographic grain (bainitic packet) and were arrested on high-angle twist type boundaries or in the upper bainite carbide colonies. The size of cleavage facets on the fracture surface corresponds to the size of the bainitic packets.
ISSN:1044-5803
1873-4189
DOI:10.1016/S1044-5803(02)00360-1