Grain-boundary characteristics in austenitic steel

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:468824

Caul, M D; Randle, V ^[1]

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1. Univ. of Wales, Swansea (United Kingdom)

Grain boundaries are an active area of research interest due to their effect on material property and structure relationships. In order to discuss material properties with regard to grain boundaries it is necessary to know the boundary type. The optimum technique for performing this task is Electron Backscatter Diffraction (EBSD) in concert with the Scanning Electron Microscope (SEM). By collecting texture measurements in the form of individual orientations from grains it is possible to obtain misorientation measurements from grain boundaries. These measurements are three of the five degrees of freedom necessary to geometrically describe a grain boundary. The other two can be obtained by a serial sectioning technique. Grain boundaries in austenitic steel specimens, isothermally aged at either 700{degrees}C or 800{degrees}C, have been evaluated with the aim of relating boundary geometry to Cr{sub 2}N precipitate formation. Samples were analysed using SEM and EBSD in order to obtain orientation measurements of individual grains to misorientations at grain boundaries and to Cr{sub 2}N precipitates.

• OSTI ID: 468824
• Report Number(s): CONF-960877--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITIC STEELS
CHROMIUM NITRIDES
ELECTRON DIFFRACTION
GRAIN BOUNDARIES
MICROSTRUCTURE
PRECIPITATION
SCANNING ELECTRON MICROSCOPY