Influence of dislocations on the spatial variation of microstructure in martensites

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Influence of dislocations on the spatial variation of microstructure in martensites

Popis výsledku v původním jazyce

Kröner's continuum theory of dislocations views each dislocation as a source of incompatibility of strains. We show that this concept can be employed efficiently in the Landau free energy functional to develop a mean-field mesoscopic model of materials with dislocations. The order parameters that represent the distortion of the parent phase are written in terms of elastic strains which are themselves coupled by incompatibility constraints. Since the ?strength of the incompatibility depends on the localdensity of dislocations, the presence of dislocations affects the evolution of the microstructure and vice versa. An advantage of this formulation is that long-range anisotropic interactions between dislocations appear naturally in the formulation of thefree energy. This novel field-theoretical approach helps to bridge the gap in studying the behavior of materials at the length and time scales that are not attainable by atomistic or macroscopic models.

Název v anglickém jazyce

Influence of dislocations on the spatial variation of microstructure in martensites

Popis výsledku anglicky

Kröner's continuum theory of dislocations views each dislocation as a source of incompatibility of strains. We show that this concept can be employed efficiently in the Landau free energy functional to develop a mean-field mesoscopic model of materials with dislocations. The order parameters that represent the distortion of the parent phase are written in terms of elastic strains which are themselves coupled by incompatibility constraints. Since the ?strength of the incompatibility depends on the localdensity of dislocations, the presence of dislocations affects the evolution of the microstructure and vice versa. An advantage of this formulation is that long-range anisotropic interactions between dislocations appear naturally in the formulation of thefree energy. This novel field-theoretical approach helps to bridge the gap in studying the behavior of materials at the length and time scales that are not attainable by atomistic or macroscopic models.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Key Engineering Materials

ISSN

1013-9826

e-ISSN

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Svazek periodika

465

Číslo periodika v rámci svazku

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Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

4

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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