Numéro
J. Phys. IV France
Volume 03, Numéro C7, Novembre 1993
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
Page(s) C7-2105 - C7-2110
DOI http://dx.doi.org/10.1051/jp4:19937335
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés

J. Phys. IV France 03 (1993) C7-2105-C7-2110

DOI: 10.1051/jp4:19937335

Atom-probe study Ti Al based alloy

A. HUGUET1, A. MENAND1, A. DENQUIN2 and S. NAKA2

1  Laboratoire de Microscopie Ionique, UA 808 du CNRS, Faculté des Sciences, BP. 118, 76134 Mont Saint Aignan, France
2  Office National d'Etudes et de Recherches Aerospatiales, BP. 72, 92355 Châtillon, France


Abstract
Two phase α2+γ Ti Al based alloys have a better ductility than single phase alloys. Oxygen seems to have a key role with respect to the ductility properties of these alloys. This paper present an atom probe determination of oxygen concentration in α2 and γ phases of two phase alloys and in single phase alloys. The nearly constant observed oxygen concentration in γ phase is considered as the oxygen maximum solubility in this phase (~ 200 at. ppm). The oxygen excess which exists in normal alloys either leads to an oxide precipitation in single phase alloys or is absorbed in the [MATH] phase of two phase alloys. The absence of oxides in two phase alloys could explain the better ductility of these alloys.



© EDP Sciences 1993