Hardening of aged duplex stainless steels by spinodal decomposition.
Mechanical properties, such as hardness and impact toughness, of ferrite-containing stainless steels are greatly affected by long-term aging at intermediate temperatures. It is known that the alpha-alpha' spinodal decomposition occurring in the iron-chromium-based ferrite is responsible for this aging susceptibility. This decomposition can be characterized unambiguously by atom probe analysis, allowing comparison both with the existing theories of spinodal decomposition and the evolution of some mechanical properties. It is then possible to predict the evolution of hardness of industrial components during service, based on the detailed knowledge of the involved aging process.
Danoix
F
F
Institut des Matériaux, Unité Mixte de Recherche CNRS 6634, Université de Rouen, BP12, 76 801 Saint Etienne du Rouvray Cedex, France. frederic.danois@univ-rouen.fr
Auger
P
P
Blavette
D
D
D002857:Chromium / Q000032:analysis; D003343:Corrosion; D004577:Electron Probe Microanalysis / Q000379:methods; D005290:Ferric Compounds / Q000032:analysis / Q000737:chemistry; D006244:Hardness; D007501:Iron / Q000032:analysis; D008422:Materials Testing / Q000379:methods*; D013193:Stainless Steel / Q000032:analysis* / Q000737:chemistry; D013997:Time Factors
D005290:Ferric Compounds; D002857:Chromium; D013193:Stainless Steel; C001215:ferrite; D007501:Iron