Isothermal and Cyclic Aging of 310S Austenitic Stainless Steel

Coralie Parrens (1) , Jacques Lacaze (1) , Benoît Malard (1) , Jean-Luc Dupain (2) , Dominique Poquillon (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 SAFRAN Group

Unusual damage and high creep strain rates have been observed on components made of 310S stainless steel subjected to thermal cycles between room temperature and 1143 K (870 °C). Microstructural characterization of such components after service evidenced high contents in sigma phase which formed first from δ-ferrite and then from γ-austenite. To get some insight into this microstructural evolution, isothermal and cyclic aging of 310S stainless steel has been studied experimentally and discussed on the basis of numerical simulations. The higher contents of sigma phase observed after cyclic agings than after isothermal treatments are clearly associated with nucleation triggered by thermal cycling.

Mots clés: Austenitic Stainless Steel; Iosthermal and cyclic oxidation

Domaines: Matériaux

Coralie Parrens, Jacques Lacaze, Benoît Malard, Jean-Luc Dupain, Dominique Poquillon. Isothermal and Cyclic Aging of 310S Austenitic Stainless Steel. Metallurgical and Materials Transactions A, 2017, 48 (6), pp.2834-2843. ⟨10.1007/s11661-017-4073-2⟩. ⟨hal-01678215⟩