Martensitic transformations in laser processed coatings

Lattice Dynamics of Martensitic Transformations Examinedby

We have performed molecular dynamics simulations of Fe 80 Ni 20 alloys using an inter-atomic potential of the EAM-type which allows the simulation of the martensite-austenite transition. We present results, showing the development of an inhomogeneous shear system on a nanoscale during the thermally induced austenitic transformation. In addition to this we obtained the phonon dispersion relation...

Stability of Microstructures for Some Martensitic Transformations

We analyze the stability of laminated microstructure for martensitic crystals that undergo cubic to trigonal, orthorhombic to triclinic, and trigonal to monoclinic transformations. We show that the microstructure is unique and stable for all laminates except when the lattice parameters satisfy certain identities.

High Pressure Effects on the Martensitic Transformations

The results of high hydrostatic pressure studies of martensitic transformations in alloys with special emphasis to shape memory alloys (SMA) are reviewed. Experimentally detected positive and negative signs of MS temperature pressure shift and phase p-T diagrams are discussed. High pressure induced shape memory effect and baroelasticity are considered to be the essential phenomena illustrating ...

Theory and model for martensitic transformations.

Symmetry and reversibility of martensitic transformations

Martensitic transformations are diffusionless solid-to-solid phase transformations characterized by a rapid change of crystal structure, observed in metals, alloys, ceramics, and proteins. They come in two widely different classes. In steels, the transformation microstructure induced by quenching remains essentially unchanged upon subsequent loading or heating; the transformation is not reversi...