| Numéro |
J. Phys. IV France
Volume 112, October 2003
|
|
|---|---|---|
| Page(s) | 139 - 142 | |
| DOI | https://doi.org/10.1051/jp4:2003851 | |
J. Phys. IV France 112 (2003) 139
DOI: 10.1051/jp4:2003851
The kinetics of lath martensitic transformation
G. Ghosh and G.B. OlsonDepartment of Materials Science and Engineering, Robert R. McCormick School of Engineering and Applied Science, Northwestem University, 2225 N. Campus Drive, Evanston, IL 60208-3108, U.S.A.
Abstract
The multicomponent solution thermodynamics, a model for barrierless heterogeneous martensitic nucleation, a model for the
composition and temperature dependence of the shear modulus, and a set of unique interfacial kinetic parameters are integrated
to model the kinetics of lath martensitic transformation. It is shown that
in multicomponent alloys can be predicted within
40K. The geometrie partitioning of austenite grain and the dependence of average lath volume on the fraction transformed is
established by a careful analysis of lath microstructure. The main contribution of lath martensitic transformation is due
to autocatalytically generated defects.
© EDP Sciences 2003