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

Journal Article · Tue Oct 15 04:00:00 EDT 2002 · Materials Characterization

DOI:https://doi.org/10.1016/S1044-5803(02)00360-1· OSTI ID:20748673

Nohava, J; Hausild, P; Karlik, M; Bompard, P

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 {l_brace}100{r_brace}, {l_brace}110{r_brace}, {l_brace}112{r_brace} and {l_brace}123{r_brace}. 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.

• OSTI ID: 20748673
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Journal Issue: 3 Vol. 49; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BACKSCATTERING
BAINITE
CARBIDES
CLEAVAGE
CRACK PROPAGATION
CRACKS
CRYSTALLOGRAPHY
ELECTRON DIFFRACTION
FRACTURES
ORIENTATION
PRESSURE VESSELS
SCANNING ELECTRON MICROSCOPY
STEELS
SURFACES