Proceedings of the 43rd International Field Emission Symposium
J. Phys. IV France 06 (1996) C5-229-C5-234
Clustering Effects Under Irradiation in Fe-0.1%Cu Alloy : An Atomic Scale Investigation with the Tomographic Atom ProbeP. Pareige, S. Welzel and P. Auger
Laboratoire de Microscopies Ionique et Electronique, URA 808 du CNRS, GMP Rouen, Faculté des Sciences de l'Université de Rouen, 76821 Mont-Saint-Aignan cedex, France
In order to understand the effect of displacement cascades on the evolution of the microstructure of ferritic low copper supersaturated materials, analyses by 3D atomic tomography of neutron, electron and self ion irradiated Fe-0.1%Cu, were performed. This alloy was chosen because of its low copper concentration, close to that of french pressure vessel steels. The comparison of the microstructure evolutions in these irradiated specimens reveals the appearance of tiny copper "clusters" or "aggregates" only when displacement cascades are involved, namely under ion or neutron irradiation. These results lead to the conclusion that displacement cascades or mixing of atoms (instead of enhanced diffusion) have a specific role on the behavior and the evolution of the solid solution of this binary alloy. 3D observation of these clusters was achieved using the tomographic atom probe.
© EDP Sciences 1996