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

F Danoix; J Lacaze; A Gibert; D Mangelinck; K Hoummada; E Andrieu

doi:10.1016/j.ultramic.2012.12.004

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

Ultramicroscopy. 2013 Sep:132:193-8. doi: 10.1016/j.ultramic.2012.12.004. Epub 2013 Jan 11.

Authors

F Danoix¹, J Lacaze, A Gibert, D Mangelinck, K Hoummada, E Andrieu

Affiliation

¹ Normandie Univ, France; UR, Groupe de Physique des Matériaux - GPM, 76801 Saint Etienne du Rouvray, France; CNRS GPM UMR 6634, 76801 Saint Etienne du Rouvray, France; INSARouen GPM, 76801 Saint Etienne du Rouvray, France. Electronic address: frederic.danoix@univ-rouen.fr.

PMID: 23522972
DOI: 10.1016/j.ultramic.2012.12.004

Abstract

The effect on Fe-Cr phase separation of a uniaxial stress during thermal ageing at 425 °C 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.

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