Precipitation mechanisms and subsequent hardening kinetics in the β-CEZ alloy

Y. COMBRES; J. BECHET; A. VASSEL

doi:doi:10.1051/jp4:1993727

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)		C7-171 - C7-176
DOI		https://doi.org/10.1051/jp4:1993727

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) C7-171-C7-176
DOI: 10.1051/jp4:1993727

Precipitation mechanisms and subsequent hardening kinetics in the β-CEZ alloy

Y. COMBRES¹, J. BECHET² and A. VASSEL³

¹ CEZUS, Centre de Recherches, avenue Paul Girod, 73400 Ugine, France
² CNAM, Laboratoire de Métallurgie, 2 rue Conté, 75003 Paris, France
³ ONERA, Direction des Matériaux, BP. 72, 92322 Châtillon, France

Abstract
The β-CEZ alloy : Ti-5%Al-2%Sn-4%Zr-4%Mo-2%Cr-l%Fe is a near β titanium alloy. Since its processing routes include heat treatment (consisting of solution treatment and ageing), it has been decided to study the influence of the β phase stability on α phase precipitation and hardening kinetics. Small sized specimens, coming from industrial heats, have been heat treated above and below the β transus, and then water quenched. Therefore, several degree of β stability are obtained. When it is increased (i.e. the solution treatment temperature is lowered), α or ω phases precipitations are delayed, as well as the hardening phenomena. Moreover, the ω stability domain is reduced. The mechanisms of α or ω precipitation are discussed, and related to the hardening kinetics.