J. Phys. IV France 03 (1993) C8-299-C8-302
Precipitation in the 15-5 PH alloy by anomalous small angle X-ray scatteringH.R. HABIBI BAJGUIRANI1, C. SERVANT1 and O. LYON2
1 Laboratoire de Métallurgie Structurale, UA 1107du CNRS, Bâtiment 413, Université de Paris-Sud, 91405 Orsay cedex, France
2 LURE, Laboratoire pour l'Utilisation du Rayonnement Electromagnétique, Bâtiment 209D, 91405 Orsay cedex, France
The precipitation of A type partially coherent precipitates occurring in the first step of the structural hardening of the 15-5 PH martensitic stainless alloy was studied by anomalous small angle X ray scattering at four absorption edges (KCr, KFe, KNi and KCu). An important anomalous effect was clearly observed at the KFe and KCu absorption edges. The precipitation occurs according to the two-phase model. Considering our alloy as a pseudo-ternary one (Cr+Ni, Fe, Cu), it has been possible to determine the slope of the tie-line corresponding to the precipitation taking place at 500°C.
© EDP Sciences 1993