Direct observation of copper precipitation in a neutron irradiated FeCu alloy by 3D atomic tomography - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Scripta Metallurgica et Materiala Année : 1995

Direct observation of copper precipitation in a neutron irradiated FeCu alloy by 3D atomic tomography

Philippe Pareige
P. Auger
  • Fonction : Auteur
P. Bas
  • Fonction : Auteur
D. Blavette

Résumé

Precipitation processes under neutron irradiation are of great interest, of course, because of their importance in nuclear industry but, also, Tom a theoretical point of view. In this scope, prediction and modelling of the property changes of pressure vessel steels under irradiation require a more in depth knowledge of the micro- structural evolution; structural and compositional features of formed precipitates being key parameters. An important case of the radiation embrittlement of pressure vessel steels is the formation of copper rich pre- cipitates (l), at leaat in those steels contaimng more than 0.1 wt% copper. A supersaturated binary FeCu model alloy (1.4wt?h Cu) was investigated in order to clarity the basic pmcesxs involved during netdmn in-ad&ion previous studies using advanced techniques such as atom probe (AR) and field ion microscopy (FIM) have been already applied to this issue (2). Nevertheless, these tech- niques could not provide a complete description of phenomena. Because of both the small particle size (~5 nm) and the basic one-dimensional characteristic of AP analyses, microstructural (sizes) and compositional information could not be obtained thoroughly with a good precision due to the large scatter of data. One of the main advantages of the new generation of atom probe that was recently developed, namely the Tomographic Atom Probe (TAR) (3), is that a three-dimensional observation of the spatial distribution of solutes (Cu) can be achieved on a near atomic scale. In this work, the very first three-dimensional (3D) images of neutron irradiated FeCu alloys provided by this new apparatus are presented and discussed. These 3D-reconstructions give for the Grst time, a direct ob- servation of irradiation induced precipitated particles in these model alloys on a subnanometer scale.

Dates et versions

hal-01928960 , version 1 (20-11-2018)

Identifiants

Citer

Philippe Pareige, P. Auger, P. Bas, D. Blavette. Direct observation of copper precipitation in a neutron irradiated FeCu alloy by 3D atomic tomography. Scripta Metallurgica et Materiala, 1995, 33 (7), pp.1033--1036. ⟨10.1016/0956-716X(95)00329-T⟩. ⟨hal-01928960⟩
16 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More