X-ray evaluation of dislocation density in ODS-Eurofer steel

The dislocation density of ferritic–martensitic oxide dispersion strengthened ODS-Eurofer steel was evaluated by using the modified Williamson–Hall method (peak broadening analysis). Measurements were performed in several metallurgical conditions (ferritic and martensitic structures). The monochromatic X-ray radiation was provided by a synchrotron source. The results match qualitatively with those provided by Vickers microhardness measurements and metallographic inspection using transmission electron microscopy.

Dislocation density (ρ) as a function of annealing temperature in 80% cold rolled ODS-Eurofer. The result of Vickers microhardness is also included in the figure.Figure optionsDownload as PowerPoint slideHighlights
► ODS-ferritic–martensitic steels.
► Thermomechanical processing.
► Martensitic transformation.
► X-ray diffraction.
► Dislocation density.