Centre d’Élaboration de Matériaux et d’Etudes Structurales (UPR 8011)


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Metallic alloys with complex microstructures

Presentation : Microstructures and mechanical properties of alloys for aeronautic

Les alliages métalliques à visée aéronautique constituent depuis une vingtaine d’années une activité de recherche importante de notre groupe. Le développement d’alliages toujours plus performants et plus fiables passe par une compréhension à différentes échelles, des micro et nano structures générées ainsi que des micromécanismes responsables des propriétés mécaniques macroscopiques. Nos études reposent principalement sur les analyses par MET des mécanismes élémentaire de déformation.

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TiAl Alloys: Microstructure and mechanical properties

During the last two decades, TiAl alloys were subjected to extensive research efforts to develop applications in gas turbine engines due to their high specific Young’s modulus and strength, and to their good oxidation and burn resistances. However, they still suffer of a poor ductility at room temperature and of a weak creep resistance.

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Structural work-hardening - Presentation

New approach of structural work-hardening in aeronautic alloys

The aeronautic industry aims at developing new metallic alloys combining a good mechanical strength and a low density. Structural work hardening is one of the most effective methods to optimize the applications where the need to reduce the weight of the structures imposes significant improvements in mechanical properties.

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Structural work-hardening: Stress-field/precipitation relationship

Stress field / precipitation relationship in steels and aluminium alloys.

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Structural work-hardening : martensitic steels

Microstructure and deformation mechanisms in last generation martensitic steels

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Titanium alloys

ß metastable alloys (Ti 555-3, Ti17 and Ti 10-2-3)

In the project PROMITI funded by the "Fondation pour la Recherche pour l’Aéronautique et l’Espace", mechanical behaviors of ß metastable titanium alloys Ti 17 and Ti 10-2-3 are compared to the new Ti 555-3 alloy.

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Nickel base superalloys

Ageing elementary mechanisms of Nickel base superalloys

The nickel-based superalloys are used in the warmest part of the turboreactors. Because they are used in extreme temperatures and stress conditions, the superalloys age.

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