A model for interphase precipitation based on finite interface solute drag theory
2010 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 58, no 14, 4791-4803 p.Article in journal (Refereed) Published
A model for interphase precipitation with the ledge mechanism, based on a eutectoid reaction, has been developed and combined with the finite interface solute drag model and a numerical solution of the diffusion equations inside the migrating phase interface. In the model, niobium flows in two directions, i.e. perpendicular to the direction of the ledge migration by eutectoid-like reaction and simultaneously parallel to the direction of the ledge migration inside the ledge interface. The difference between ledge transformation and typical phase transformation is compared using this model and the effects of row spacing, temperature and segregation energy are discussed. The calculation results using the model are compared with experimental results and the critical driving force for interphase precipitation is evaluated. The estimations of the niobium carbide precipitation using this model are in good agreement with experimental results.
Place, publisher, year, edition, pages
2010. Vol. 58, no 14, 4791-4803 p.
MULTICOMPONENT DIFFUSION, PHASE INTERFACES, VANADIUM STEELS, ALLOY-STEELS, TRANSFORMATION, AUSTENITE, BOUNDARIES, KINETICS, NIOBIUM, GROWTH
IdentifiersURN: urn:nbn:se:kth:diva-29500DOI: 10.1016/j.actamat.2010.05.016ISI: 000279845400020ScopusID: 2-s2.0-77953873044OAI: oai:DiVA.org:kth-29500DiVA: diva2:394630
QC 201102032011-02-032011-02-022011-02-03Bibliographically approved