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Comparative analysis of the methods to determine the percentage of ferrite in the joints welded in duplex steel

Publication on "Rivista Italiana della Saldatura" no. 4 of 2016 -
Two-phase stainless steels with a metallurgical structure of austenite and ferrite, commonly called duplex, have an excellent combination of mechanical properties and resistance to corrosion, especially if compared to the common stainless steels.
In off-shore engineering that allows for the designing of components
with lesser thickness (and therefore lighter), without compromising their resistance to corrosion and thus avoiding the use of expensive corrosion resistant coatings.
From the welding point of view, duplex steels need to be treated in the same way as
austenitic stainless steels, but with dedicated caution to limit the sensibilization of the joints if they are welded with too lenient heat cycles.

Analisi comparativa dei metodi per la determinazione della percentuale di ferrite per giunti saldati in acciaio duplex - Pubblicazione su Rivista Italiana della Saldatura 4-2016 - Luglio 2016

Comparative analysis on phase quantification methods in duplex stainless steels weldments

Pubblicazione sulla "Rivista La Metallurgia Italiana" Aprile 2015 - Duplex Stainless Steels (DSS) are biphasic steels of increasing interest, employment as structural materials in aggressive environments. In these steels, the austenite-to-ferrite phase ratio is maintained at about one – even if a slightly wider range between 40/60 and 60/40 is in any case accepted – giving the best combination of mechanical and corrosion-resistance properties. However, DSS must be handled with extreme care, especially if thermal cycles are involved, owing to the possible formation of dangerous secondary compounds that can highly worsen their excellent features.

Comparative analysis on phase quantification method in duplex stainless steels weldments - Pubblicazione su La Metallurgia Italiana - Aprile 2015

Mechanical and structural characterization of UNS S32760 welded joints for Off-Shore applications

Publication on "Rivista Italiana della Saldatura" no. 2 of 2014 -
The article describes the preparation and the inspection of a welding procedure for a UNS S32760 (Super Duplex F55) joint to be used in Off-Shore environment.
The joint was produced as a result of two processes, being the first the manual TIG (GTAW) process and the second the Shielded Metal Arc Welding (SMAW), in order to obtain the combination of mechanical and microstructural properties requested by the Client.

Caratterizzazione meccanica e strutturale di giunti saldati UNS S32760 per applicazioni Off-Shore - Pubblicazione sulla Rivista Italiana della Saldatura n° 2 del 2014

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