Influence of heat treatments at 475 and 400 °C on the pitting corrosion resistance and sensitization of UNS S32750 and UNS S32760 superduplex stainless steels / S. S. M. Tavares in Materials and corrosion, Vol. 63 N° 6 (Juin 2012)  

Public ISBD [article]  inMaterials and corrosion > Vol. 63 N° 6 (Juin 2012) . - pp. 522–526 Titre : Influence of heat treatments at 475 and 400 °C on the pitting corrosion resistance and sensitization of UNS S32750 and UNS S32760 superduplex stainless steels Type de document : texte imprimé Auteurs : S. S. M. Tavares, Auteur ; A. Loureiro, Auteur ; J. M. Pardal, Auteur Année de publication : 2012 Article en page(s) : pp. 522–526 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Low temperature aging  pitting corrosion  superduplex stainless steel Résumé : Some precipitation reactions of superduplex stainless steels (SDSS) can improve hardness, yield, and ultimate strength, but with substantial decrease of corrosion resistance. One of these reactions is the spinodal decomposition of ferrite into Cr-rich fine precipitates (α′) and Cr-depleted matrix during low temperature aging. In this work, the effect of the α′ precipitation on the pitting corrosion resistance was investigated. The results showed that short duration heat treatments at 475 °C do not decrease the pitting corrosion resistance, but increase the hardness of UNS S32750 and S32760 SDSS. The limits of heat treatment duration for both steels were determined. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201006016/abstract [article] Influence of heat treatments at 475 and 400 °C on the pitting corrosion resistance and sensitization of UNS S32750 and UNS S32760 superduplex stainless steels [texte imprimé] / S. S. M. Tavares, Auteur ; A. Loureiro, Auteur ; J. M. Pardal, Auteur . - 2012 . - pp. 522–526. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 6 (Juin 2012) . - pp. 522–526 Mots-clés : Low temperature aging  pitting corrosion  superduplex stainless steel Résumé : Some precipitation reactions of superduplex stainless steels (SDSS) can improve hardness, yield, and ultimate strength, but with substantial decrease of corrosion resistance. One of these reactions is the spinodal decomposition of ferrite into Cr-rich fine precipitates (α′) and Cr-depleted matrix during low temperature aging. In this work, the effect of the α′ precipitation on the pitting corrosion resistance was investigated. The results showed that short duration heat treatments at 475 °C do not decrease the pitting corrosion resistance, but increase the hardness of UNS S32750 and S32760 SDSS. The limits of heat treatment duration for both steels were determined. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201006016/abstract

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