The axial ising model for martensitic transformations and pseudoelasticity
| Autor: | A.Yu. Gaevsky, E.D. Belokolos |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
Materials science
Condensed matter physics General Chemistry Condensed Matter Physics Theory based Stress field Condensed Matter::Materials Science symbols.namesake Diffusionless transformation Martensite Pseudoelasticity symbols Shear stress General Materials Science Ising model Hamiltonian (quantum mechanics) |
| Zdroj: | Journal of Physics and Chemistry of Solids. 50:1199-1205 |
| ISSN: | 0022-3697 |
| DOI: | 10.1016/0022-3697(89)90390-9 |
| Popis: | A theory based on the Ising axial model for the martensitic transformation between close-packed structures in an external stress field is proposed. The quasi-spin Hamiltonian was derived for a stratified close-packed crystal which under certain limitations has the form of a Hamiltonian of the ANNNI-model wherein “the exchange integrals” are expressed in terms of the interlayer interaction potentials. The dependence of the strain on the shear stress is calculated for alloys showing the pseudoelasticity effect and it is shown that the number of steps in the deformation curve is defined by the radius of the interlayer interaction. The theory proposed is applied to the explanation of the stress-induced martensitic transformations in Cu-Al-Ni alloys. |
| Databáze: | OpenAIRE |
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