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Hardening of Aged Duplex Stainless Steels by Spinodal Decomposition

Published online by Cambridge University Press:  01 June 2004

F. Danoix ,
P. Auger  and
D. Blavette
F. Danoix
Affiliation:
Institut des Matériaux, Unité Mixte de Recherche CNRS 6634, Université de Rouen, BP12, 76 801 Saint Etienne du Rouvray Cedex, France
P. Auger
Affiliation:
Institut des Matériaux, Unité Mixte de Recherche CNRS 6634, Université de Rouen, BP12, 76 801 Saint Etienne du Rouvray Cedex, France
D. Blavette
Affiliation:
Institut des Matériaux, Unité Mixte de Recherche CNRS 6634, Université de Rouen, BP12, 76 801 Saint Etienne du Rouvray Cedex, France
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Abstract

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 α-α′ 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.

Keywords

atom probemicrostructural characterizationiron–chromiumstainless steelsferritespinodal decompositionmechanical properties
Type
Research Article
Information
Microscopy and Microanalysis , Volume 10 , Issue 3 , June 2004 , pp. 349 - 354
Copyright
© 2004 Microscopy Society of America

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References

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