On the mobility of the austenite-ferrite interface in Fe-Co and Fe-Cu

Citation
Si. Vooijs et al., On the mobility of the austenite-ferrite interface in Fe-Co and Fe-Cu, MET MAT T A, 31(2), 2000, pp. 379-385
Citations number
22
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science",Metallurgy
Journal title
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN journal
10735623 → ACNP
Volume
31
Issue
2
Year of publication
2000
Pages
379 - 385
Database
ISI
SICI code
1073-5623(200002)31:2<379:OTMOTA>2.0.ZU;2-Y
Abstract
The kinetics of diffusional transformations in steels depend on a large num ber of parameters, such as grain geometry, nucleation behavior, and growth kinetics. An essential step in the process is the lattice transformation, t he kinetics of which can be expressed by the mobility of the interface betw een the matrix and the newly forming phase. To study the intrinsic mobility of the austenite-ferrite interface, i.e., the mobility of the interface in the absence of long-range diffusion, differential thermal analysis (DTA) e xperiments were performed on high-purity dilute Fe-Co and Fe-Cu alloys. The data obtained were analyzed using a three-dimensional geometry, based on a tetrakaidecahedron model for the austenite grain and a recent interface mo bility model. The observed transformation behavior is described accurately, with the interface mobility being composition dependent.