High temperature oxidation and embrittlement at 500–600 °C of Ti-6Al-4V alloy fabricated by Laser and Electron Beam Melting

Antoine Casadebaigt (1, 2) , Jonathan Hugues (1) , Daniel Monceau (2)

1 IRT Saint Exupéry - Institut de Recherche Technologique
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

The oxidation kinetics of Ti-6Al-4V alloys fabricated by LBM and EBM, HIP-treated or not, are similar to that of a rolled annealed Ti-6Al-4V alloy, as regards oxide layer and oxygen diffusion layer thickness. Kinetics of oxygen ingress in the metal is independent of the alloy microstructure. At room temperature, the thickness of the brittle layer after a tensile test corresponds to the oxygen diffusion layer, with an oxygen concentration above a critical value that is clearly below 1 at %.

Mots clés: High temperature oxidation; Oxygen diffusion zone; Oxygen embrittlement; Titanium; TA6V; Additive manufacturing; SLM; EBM

Domaines: Matériaux

Antoine Casadebaigt, Jonathan Hugues, Daniel Monceau. High temperature oxidation and embrittlement at 500–600 °C of Ti-6Al-4V alloy fabricated by Laser and Electron Beam Melting. Corrosion Science, 2020, 175, pp.108875. ⟨10.1016/J.CORSCI.2020.108875⟩. ⟨hal-03033588⟩