Effect of external stress on the Fe–Cr phase separation in 15-5 PH and Fe–15Cr–5Ni alloys

Fréderic Danoix (1) , Jacques Lacaze (2) , A. Gibert (1) , Dominique Mangelinck (3) , Khalid Hoummada (3) , Eric Andrieu (2)

1 GPM - Groupe de physique des matériaux
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
3 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence

The effect on Fe–Cr phase separation of a uniaxial stress during thermal ageing at 4251C is investigated on a Fe–15Cr–5Ni steel, a model alloy of commercial 15-5 PH steel. The applied stress is shown to accelerate the ageing kinetics, and influence the morphology of Cr rich domains. A dependence of the phase separation decomposition kinetics on the relative orientations of the load and the crystal local orientation has also been observed.

Mots clés: Atom probe tomography; Fe–Cr phase separation; Stress ageing; 15-5 PH

Domaines: Matériaux

Fréderic Danoix, Jacques Lacaze, A. Gibert, Dominique Mangelinck, Khalid Hoummada, et al.. Effect of external stress on the Fe–Cr phase separation in 15-5 PH and Fe–15Cr–5Ni alloys. Ultramicroscopy, 2013, vol. 132, pp. 193-198. ⟨10.1016/j.ultramic.2012.12.004⟩. ⟨hal-01170260⟩