Mathematical models of martensitic microstructure
نویسندگان
چکیده
منابع مشابه
Modelling the Microstructure of Martensitic Steels
A method based on the kinetics of crystal growth has been developed and applied to the computation of three-dimensional microstrucuture in austenite-matensite steels. The detailed crystallography of the transformation is used to model a realistic martensitic microstrucuture during the transformation without an external system of stresses. The interaction energy based on the plastic work model i...
متن کاملMicroscale simulation of martensitic microstructure evolution.
A new model for the evolution of multivariant martensitic microstructure in single crystals and polycrystals is developed. In contrast with Landau-Ginzburg models, which are limited in practice to nanoscale specimens, this new scale-free model is valid for length scales greater than 100 nm and without an upper bound. It is based on a thermodynamic potential in the volume fractions of the marten...
متن کاملMicrostructure and cleavage in lath martensitic steels
In this paper we discuss the microstructure of lath martensitic steels and the mechanisms by which it controls cleavage fracture. The specific experimental example is a 9Ni (9 wt% Ni) steel annealed to have a large prior austenite grain size, then examined and tested in the as-quenched condition to produce a relatively coarse lath martensite. The microstructure is shown to approximate the recen...
متن کاملInterface propagation and microstructure evolution in phase field models of stress-induced martensitic phase transformations
Analytical solutions for diffuse interface propagation are found for two recently developed Landau potentials that account for the phenomenology of stress-induced martensitic phase transformations. The solutions include the interface profile and velocity as a function of temperature and stress tensor. An instability in the interface propagation near lattice instability conditions is studied num...
متن کاملThe stability and numerical analysis of martensitic microstructure
The elastic energy density in the geometrically nolinear theory of martensite is minimized on multiple, rotationally invariant energy wells. For such energy densities , the gradients of energy-minimizing sequences can oscillate between the energy wells to approach the lowest energy. In this paper, we describe a stability theory for this microstructure, and we apply this stability theory to the ...
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ژورنال
عنوان ژورنال: Materials Science and Engineering: A
سال: 2004
ISSN: 0921-5093
DOI: 10.1016/j.msea.2003.11.055