A model for interphase precipitation based on finite interface solute drag theory theory

摘要

A model for interphase precipitation based on finite interface solute drag theory theory. Nippon Steel Corp., Steel Research labs. ○R. Okamoto KTH, Materials Science and Engineering J. Agren The ledge mechanism for interphase precipitation was suggested by Honeycombe. The mechanism assumes that the phase interfaces move by the sideways migration of ledges and the alloy carbides are formed on the terraces. Lagneborg et al. proposed a model for the mechanism based on the eutectoid formation with alloy elements diffusing to carbide through the migrating phase interface, the ledge. However, the model would not take into account the solute drag, even though the solute drag strongly affects on the phase transformation, and thus on the interphase precipitation, too. , The purpose of the present work is to develop a simulation model for interphase precipitation based on Lagneborg’s ledge mechanism and Odqvist’s solute drag model and to apply it to the Fe-Nb-C system.