Phenomenological theory of martensitic and reconstructive phase transitions

Autor:	V. M. Laptve, V. N. Syromyatnikov, Yu. A. Izyumov
Rok vydání:	1994
Předmět:	Austenite Condensed Matter::Materials Science Phase transition Nonlinear minimization Materials science Condensed matter physics Lattice (order) Martensite Infinitesimal strain theory General Materials Science Instrumentation Landau theory
Zdroj:	Phase Transitions. 49:1-55
ISSN:	1029-0338 0141-1594
DOI:	10.1080/01411599408201169
Popis:	The review deals predominantly with a description of martensitic phase transitions on the basis of Landau theory, using the strain of a crystal as the order parameter and the expansion of energy in powers of the strain and its gradients. The important role of compatibility equations for strain tensor components in minimizing the free energy is shown. Various models which allow for localized solutions of the nonlinear minimization equations are considered. Soliton and kink-type solutions are interpreted as the solutions representing inclusions of the martensite phase in austenite and domain boundaries between adjacent martensite domains or interfaces between martensite and austenite. For the simplest models, the shape of martensite inclusions—or that of localized objects within the pretransition region—as well as their orientation in the crystal and the orientation of domain boundaries, are determined. The role of specific atomic displacements which accompany spontaneous lattice deformations in th...
Databáze:	OpenAIRE
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