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The effect of copper on secondary phase precipitation in duplex stainless steel - a thermodynamic calculations approach
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Termodynamisk modellering.ORCID-id: 0000-0001-5031-919X
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Keramteknologi.
2005 (engelsk)Inngår i: Zeitschrift für Metallkunde, ISSN 0044-3093, Vol. 96, nr 8, s. 918-923Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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.

sted, utgiver, år, opplag, sider
2005. Vol. 96, nr 8, s. 918-923
Emneord [en]
Thermo-Calc, thermodynamic calculations, duplex stainless steels, copper, secondary phases, industrial heat-treatments, corrosion
Identifikatorer
URN: urn:nbn:se:kth:diva-15033ISI: 000231800500014Scopus ID: 2-s2.0-24344450080OAI: oai:DiVA.org:kth-15033DiVA, id: diva2:333074
Merknad
QC 20100525Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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