Structure-Property-Processing Relationsships in Thin Section -TiAl Intermetallics prepared by Spray Deposition and Thermomechanical Methods

• Unité de recherche: COST
• Numéro de projet: C95.0025
• Titre du projet anglais: Structure-Property-Processing Relationsships in Thin Section -TiAl Intermetallics prepared by Spray Deposition and Thermomechanical Methods

Mots-clé (Anglais)

Titanium aluminides; microstructure; mechanical properties; twinning

Programme de recherche (Anglais)

COST-Action 513 - Improvement in availability and quality of intermetallic-based materials

Description succincte (Anglais)

See abstract

Partenaires et organisations internationales (Anglais)

A, CH, CZ, D, F, FIN, I, UK

Résumé des résultats (Abstract) (Anglais)

The aim of the project at the University of Neuchâtel was to characterise the microstructural features of ¡-based TiAI alloys containing chromium and niobium additions. Alloys prepared by thermomechanical processes such as hot forging or rolling were examined. Room and high temperature deformation tests, including creep, were also carried out and the deformed structures were related to the a2 /¡ distributions or to texture, depending on the process initially applied. It has been possible to relate the deformation mechanisms active within the ¡ phase to the creep strength of equiaxed alloys produced by hot forging. In particular, mechanical twinning appears related to the different ductility exhibited by one of the alloys as a function of the texture produced by the hot rolling process.

Références bases de données (Anglais)

Swiss Database: COST-DB of the State Secretariat for Education and Research Hallwylstrasse 4 CH-3003 Berne, Switzerland Tel. [phone] Swiss Project-Number: C95.0025