The effect of copper on secondary phase precipitation in duplex stainless steel - a thermodynamic calculations approach
2005 (English)In: Zeitschrift für Metallkunde, ISSN 0044-3093, Vol. 96, no 8, 918-923 p.Article in journal (Refereed) Published
Thermodynamic calculations with Thermo-Calc software and the steel database TCFE3 was applied to investigate the precipitation behavior of industrial grades of duplex stainless steels with high copper content, 1.6 and 2.3 wt.%, Duplok 27 and DUP 27, respectively. Well-documented super duplex stainless grade SAF 2507 with copper content of 0.20 wt.% was used as the reference steel. The results of the calculations are compared with the experimental results obtained previously for these steels. It is shown that copper decreases the high-temperature limit of precipitation of sigma and chi phases and reduces the equilibrium amount of precipitated chi phase. Copper addition to a duplex stainless steel facilitates precipitation of chromium nitride phase and stabilizes it at elevated temperatures. The ferrite-austenite balance at high temperatures is also affected in these steels by the copper addition.
Place, publisher, year, edition, pages
2005. Vol. 96, no 8, 918-923 p.
Thermo-Calc, thermodynamic calculations, duplex stainless steels, copper, secondary phases, industrial heat-treatments, corrosion
IdentifiersURN: urn:nbn:se:kth:diva-15033ISI: 000231800500014ScopusID: 2-s2.0-24344450080OAI: oai:DiVA.org:kth-15033DiVA: diva2:333074
QC 201005252010-08-052010-08-05Bibliographically approved