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Title:	Study of the thermochemical surface treatment effect on the phase precipitation and degradation behavior of DSS and SDSS
Author:	Biserova Tahchieva, Alisiya; Cabrera Marrero, José M.; Llorca Isern, Núria
Other authors:	Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials; Universitat Politècnica de Catalunya. PROCOMAME - Processos de Conformació de Materials Metàl·lics
Abstract:	In this study, the effect of a plasma ion carburizing process to duplex and superduplex stainless steels (DSS and SDSS), at 925 °C for a long time, as thermochemical process influencing the microstructural evolution is presented. The objective is to analyse the diffusion elements' influence on the precipitation of secondary phases after additional short thermal treatment. A comparison among the different treatments was performed after the resulting microstructures were analysed by Field Emission-Scanning Electron Microscope. Precipitation of secondary phases-sigma (s), chi (¿), nitrides and carbides-seemed to occur during the treatments in a similar way for both steels (DSS and SDSS), although they showed a different morphology and precipitation mode. General corrosion behaviour of untreated and treated samples was investigated by potentiodynamic tests in order to prove their corrosion resistance. It was found that an improvement of the surface protection after the plasma carburizing process occurred.
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria dels materials -Stainless steel -Steel -- Corrosion -Corrosion -Duplex stainless steel -Plasma ion carburizing -Secondary phases -Superduplex stainless steel -Thermal treatments -Acer inoxidable -Acer -- Corrosió
Rights:	Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Document type:	Article - Published version Article
Published by:	MDPI AG
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