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Evaluation of austenite reformation in duplex stainless steel weld metal using computational thermodynamics
RISE, Swerea, Swerea KIMAB.
KTH Royal Institute of Technology.
2014 (English)In: Welding in the World, ISSN 0043-2288, E-ISSN 1878-6669, Vol. 58, no 2, 217-224 p.Article in journal (Refereed)
Abstract [en]

This paper provides a theoretical study of austenite reformation during cooling of duplex stainless weld metal using computational thermodynamics and kinetics. Model alloys of the superduplex 2509 weld metal and 2205 base material were used for the study and austenite reformation was calculated at equilibrium conditions and at cooling rates from 0.01 to 2,000 K/s. The calculations also provided the possibility to study the distribution of the alloying elements at ferrite and austenite phase boundaries. The importance of nitrogen for austenite reformation at rapid cooling was studied by comparing with simulations for a low-nitrogen alloy. The results were also compared with experimental and model results from the literature providing good correlation and the unique possibility to study the distribution of alloying elements between the growing austenite and the shrinking ferrite. © 2013 International Institute of Welding.

Place, publisher, year, edition, pages
2014. Vol. 58, no 2, 217-224 p.
Keyword [en]
Austenite, Duplex stainless steel, Mathematical models, Thermodynamics, Weld metal
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-12803DOI: 10.1007/s40194-013-0104-9Scopus ID: 2-s2.0-84898992877OAI: oai:DiVA.org:ri-12803DiVA: diva2:972996
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2017-11-21Bibliographically approved

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