Cyclic deformation of TiAl generic microstructures at room and high temperature: Bauschinger effect & strain rate sensitivity

Etude de la déformation des microstructures génériques des alliages TiAl sous sollicitation cyclique à température ambiante et haute température : effet Bauschinger et viscosité

Pierre Serrano (1) , Louise Toualbi (1) , Pascale Kanoute (1) , Alain Couret (2)

1 DMAS, ONERA, Université Paris Saclay [Châtillon]
2 CEMES - Centre d'élaboration de matériaux et d'études structurales

The cyclic deformation of four TiAl common microstructures is studied experimentally at room and high temperature. Multilevel and multirate tests are performed to highlight the microstructure impact on the Bauschinger effect and the strain rate sensitivity. The mechanical behaviors are linked to their corresponding deformation mechanisms. Results can directly be used to develop microstructure-sensitive modeling of the mechanical behaviors of TiAl alloys.

Mots clés: Cyclic plasticity; Plastic deformation mechanisms; Microstructure; Yield behavior; Mechanical testing; Intermetallics aluminides

Domaines: Sciences de l'ingénieur [physics]; Physique [physics]; Chimie

Pierre Serrano, Louise Toualbi, Pascale Kanoute, Alain Couret. Cyclic deformation of TiAl generic microstructures at room and high temperature: Bauschinger effect & strain rate sensitivity. Intermetallics, 2020, 122, pp.106816. ⟨10.1016/j.intermet.2020.106816⟩. ⟨hal-02386237v2⟩