Study of the Elemental Partitioning for Different Transformation Conditions in the Ti-5553 Alloy

Charrier Guillaume (1, 2) , Moukrane Dehmas (1, 3) , Marion Descoins (4) , Dominique Mangelinck (4) , Elisabeth Aeby-Gautier (1, 3) , Benoit Appolaire (5) , Sandra Andrieu (2) , Francis Soniak (6)

1 IJL - Institut Jean Lamour
2 Messier Bugatti Dowty Bidos
3 Labex DAMAS
4 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence
5 LEM - ONERA - CNRS - Laboratoire d'étude des microstructures [Châtillon]
6 Messier-Bugatti-Dowty Vélizy-Villacoublay

The microstructure and the solute distribution inside the phases after isothermal holding in the temperature range between 420°C and 700°C in the Ti-5553 alloy were analyzed using TEM equipped with an EDX analyzer and atom probe tomography. When phase transformation occurred at high temperatures (≥ 600°C), a significant partitioning of all solute elements was characterized. After a long holding time, the distribution was nearly homogeneous in each phase. For a transformation at lower temperature (410°C), a low partitioning was observed at the beginning of the transformation, after 40 min, and the precipitates composition notably evolved with increasing time toward an expected composition of equilibrium alpha phase.

Mots clés: Ti-5553 ALLOY; CHEMICAL COMPOSITION; EQUILIBRIUM STATE; TEM-EDX; ATOM PROBE TOMOGRAPHY

Mots clés: COMPOSITION CHIMIQUE; EQUILIBRE; ATOME; SONDE

Domaines: Matériaux

Charrier Guillaume, Moukrane Dehmas, Marion Descoins, Dominique Mangelinck, Elisabeth Aeby-Gautier, et al.. Study of the Elemental Partitioning for Different Transformation Conditions in the Ti-5553 Alloy. Ti 2015 (the 13th World Conference on Titanium), Aug 2015, SAN DIEGO, United States. ⟨10.1002/9781119296126.ch88⟩. ⟨hal-01521863⟩