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Impact Toughness of Isothermally Treated Duplex Stainless Steels

Published online by Cambridge University Press:  25 February 2014

I. Calliari ,
M. Breda ,
G. Straffelini ,
A. F. Miranda Perez  and
F. A. Reyes Valdes
I. Calliari
Affiliation:
Industrial Engineering Department, via Marzolo 9 int.4, Padova, Italy.
M. Breda
Affiliation:
Industrial Engineering Department, via Marzolo 9 int.4, Padova, Italy.
G. Straffelini
Affiliation:
Department of Materials Engineering and Industrial Technologies, Mesiano 77, Trento, Italy.
A. F. Miranda Perez*
Affiliation:
Corporación Mexicana de Investigación en Materiales, Ciencia y Tecnologia 790, Saltillo, México.
F. A. Reyes Valdes
Affiliation:
Corporación Mexicana de Investigación en Materiales, Ciencia y Tecnologia 790, Saltillo, México.
*
*Email: [email protected]
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Abstract

Duplex stainless steels (DSS) have good mechanical and corrosion resistance properties which allow their application in very aggressive environments. However, their aging at 600–1000 °C causes the precipitation of dangerous intermetallic phases, resulting in serious detrimental effects on their interesting properties. These secondary phases are structural discontinuities which act as preferential cracks initiation sites and their negative effect is especially highlighted on toughness. For these reasons, many standards related to the manufacturing of DSS require the microstructure of these steels "free from intermetallics". In this paper, the effect of isothermal heat treatments on the impact toughness in two Duplex steels (SAF 2205 and Zeron®100) has been investigated, in order to study the influence of different amount of secondary phases on the toughness response.

Keywords

steeltoughnesscorrosion
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1616: Symposium S5C – Structural and Chemical Characterization of Metals, Alloys, and Compounds - 2013 , 2014 , imrc2013-s5c-o068
Copyright
Copyright © Materials Research Society 2014 

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References

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