ÉTUDE DU COMPORTEMENT THERMOMÉCANIQUE DES AMF MONO ET POLYCRISTALLINS

ÉTUDE DU COMPORTEMENT THERMOMÉCANIQUE DES AMF MONO ET POLYCRISTALLINS

Loubna HESSISSEN

101,44 €
IVA incluido
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Editorial:
KS OmniScriptum Publishing
Año de edición:
2025
ISBN:
9786208822880
101,44 €
IVA incluido
Disponible

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Le présent travail décrit le comportement thermomécanique des alliages à mémoire de forme (AMF) associé aux transformations martensitiques. Après un bref historique des AMF, les propriétés thermoélastiques de ces matériaux sont rappelées, les divers domaines d’application preuves de leur viabilité économique y sont présentés et les aspects microstructuraux de la transformation martensitique détaillés. Par la suite, une modélisation micromécanique du comportement de ces matériaux a été développée. Cette modélisation, adaptée à l’échelle de description de la microstructure et basée sur une description relativement simple du mécanisme de transformation, a permis dans le formalisme des petites déformations, de tenir compte des interactions intra et intergranulaires dans l’expression du potentiel thermodynamique établi par l’intermédiaire de la théorie de Gibbs. L’hétérogénéité entre les deux phases a été négligée et l’élément de base de la transformation est la déformation associée à la formation d’une variante de martensite, dont la fraction volumique représente la variable interne intervenant dans la définition du potentiel. Enfin, les résultats numériques obtenus sont discutés.

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