Detection of breakaway oxidation with Acoustic Emission during titanium oxide scale growth

M.T. Tran (1) , M. Boinet (2) , A. Galerie (1) , Y. Wouters (1)

1 SIMaP - Science et Ingénierie des Matériaux et Procédés
2 Euro. Phys. Acoust. SA

Extensive in-situ analysis of high temperature breakaway oxidation of titanium metal has been performed using the Acoustic Emission (AE) technique. Depending on temperature and oxidising atmosphere, different model cases were examined: with breakaway (900 degrees C/O-2), without breakaway (750 degrees C/O-2 and 900 degrees C/H2O). Two specific population of AE hits were observed before and after breakaway. Contrary to the pre-breakaway population, the post-breakaway population exhibited low AE activity characterised by high values of energy. A critical energy value of E = 3 fj was determined as a frontier between signals resulting from oxide parabolic growth and signals resulting from rapid linear growth.

Mots clés: Acoustic Emission; Titanium oxidation; TiO2 scale growth; Scale; decohesion; FERRITIC STAINLESS-STEELS; MECHANICAL ADHESION ENERGY; HIGH-TEMPERATURE; OXIDATION; WATER-VAPOR; THERMAL-OXIDATION; TENSILE TEST; ALLOYS

Domaines: Matériaux

M.T. Tran, M. Boinet, A. Galerie, Y. Wouters. Detection of breakaway oxidation with Acoustic Emission during titanium oxide scale growth. Corrosion Science, 2010, 52 (7), pp.2365-2371. ⟨10.1016/j.corsci.2010.03.015⟩. ⟨hal-00517198⟩