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Microstructural Evolution in 2101 Lean Duplex Stainless Steel During Low- and Intermediate-Temperature Aging

Published online by Cambridge University Press:  04 March 2016

Jean-Yves Maetz ,
Sophie Cazottes ,
Catherine Verdu ,
Frédéric Danoix  and
Xavier Kléber
Jean-Yves Maetz*
Affiliation:
Université de Lyon, INSA de Lyon, MATEIS, UMR CNRS 5510, 69621 Villeurbanne Cedex, France
Sophie Cazottes
Affiliation:
Université de Lyon, INSA de Lyon, MATEIS, UMR CNRS 5510, 69621 Villeurbanne Cedex, France
Catherine Verdu
Affiliation:
Université de Lyon, INSA de Lyon, MATEIS, UMR CNRS 5510, 69621 Villeurbanne Cedex, France
Frédéric Danoix
Affiliation:
Groupe de Physique des Matériaux, Université et INSA de Rouen—UMR CNRS 6634—Normandie Université, 76801 Saint Étienne du Rouvray Cedex, France
Xavier Kléber
Affiliation:
Université de Lyon, INSA de Lyon, MATEIS, UMR CNRS 5510, 69621 Villeurbanne Cedex, France
*
*Corresponding author.[email protected]
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Abstract

The microstructural evolution of a 2101 lean duplex stainless steel (DSS) during isothermal aging from room temperature to 470 °C was investigated using thermoelectric power (TEP) measurements to follow the kinetics, atom probe tomography, and transmission electron microscopy. Despite the low Ni, Cr, and Mo contents, the lean DSS was sensitive to α–α′ phase separation and Ni–Mn–Si–Al–Cu clustering at intermediate temperatures. The time–temperature pairs characteristic of the early stages of ferrite decomposition were determined from the TEP kinetics. Considering their composition and locations, the clusters are most likely G phase precursors.

Keywords

duplex stainless steelferrite decompositionclusteringatom probe tomographythermoelectric power
Type
Materials Applications
Information
Microscopy and Microanalysis , Volume 22 , Supplement 2 , April 2016 , pp. 463 - 473
Copyright
© Microscopy Society of America 2016 

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