Comparison between SANS and APT measurements in a thermally aged Fe-19 at.%Cr alloy

O. Tissot (1) , Cristelle Pareige (2) , M.-H. Mathon (3) , M. Roussel (2) , E. Meslin (4) , B. Décamps (5) , J. Henry (1)

1 SRMA - Service des Recherches Métallurgiques Appliquées
2 GPM - Groupe de physique des matériaux
3 LLB - UMR 12 - Laboratoire Léon Brillouin
4 SRMP - Service de recherches de métallurgie physique
5 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière

α′ precipitation in a Fe-19 at.%Cr alloy aged at 500 °C up to 2008 h has been characterized by both APT and SANS. This paper shows that when using an appropriate method for SANS data treatment, both APT and SANS yield consistent results regarding not only volume fraction and size but also α and α′ composition. Good agreement is achieved when α′ particles are considered as magnetic scattering features at the early stage of the kinetics.

Keywords: Fe-Cr; Atom Probe Tomography (APT); Small Angle Neutron Scattering (SANS); Precipitation

Domains: Physics [physics]; Condensed Matter [cond-mat]; Materials Science [cond-mat.mtrl-sci]; Physics [physics]; Nuclear Experiment [nucl-ex]; Physics [physics]; Nuclear Theory [nucl-th]

O. Tissot, Cristelle Pareige, M.-H. Mathon, M. Roussel, E. Meslin, et al.. Comparison between SANS and APT measurements in a thermally aged Fe-19 at.%Cr alloy. Materials Characterization, 2019, 151, pp.332-341. ⟨10.1016/j.matchar.2019.03.027⟩. ⟨hal-02106979⟩