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Influence of isothermal aging on secondary phases precipitation and toughness of a duplex stainless steel SAF 2205

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Abstract

In this paper the results of secondary phases determination in a SAF 2205 duplex steel, heat treated at 780, 850 and 900 °C for 10–40 min, are presented. χ-phase is the first phase to precipitate at all the temperatures, followed by σ-phase. The main drop of toughness is related to very low contents of χ-phase and σ-phase. Hardness is not a sensitive parameter to low amounts of secondary phases.

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Acknowledgements

Acciaierie Valbruna (Vicenza) are thanked for alloy supplying, prof. A. Molinari and G. Straffelini (University of Trento) are gratefully acknowledged for the Charpy impact test.

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Authors and Affiliations

  1. Department of Innovation in Mechanics and Management (DIMEG), University of Padova, Via Marzolo, 9, 35131, Padova, Italy

    I. Calliari, M. Zanesco & E. Ramous

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  1. I. Calliari
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  2. M. Zanesco
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  3. E. Ramous
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Correspondence to I. Calliari.

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Calliari, I., Zanesco, M. & Ramous, E. Influence of isothermal aging on secondary phases precipitation and toughness of a duplex stainless steel SAF 2205. J Mater Sci 41, 7643–7649 (2006). https://doi.org/10.1007/s10853-006-0857-2

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  • DOI: https://doi.org/10.1007/s10853-006-0857-2

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