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

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

Constitutive relations for a commercially pure aluminium from room temperature to 500°C.

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Irrigere : a generalized version of an irrigation scheduling model for a wide range of crops

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Structure/Deformation Relationship in a ß Metastable Ti-Alloy

This paper presents the first results of an ongoing research which was set up to investigate the influence of ß-rich microstructures on the derformation mechanisms of the recently developed ß-Cez alloy. Depending on the heat treatment, strong differences in the mecanical behaviour of this ß metastable alloy were obtained. They can be explained by the relative contribution of slip and formation of stress induced martensite during deformation. The relative contribution of the two mechanisms is influenced by the chemical composition of the ß phase and also by microstructural features. In particular, large ß grains are shown to favour the formation of stress induced martensite

Precipitation mechanisms and subsequent hardening kinetics in the #beta#-CEZ alloy

Published in the Proceedings of 'Congres EUROMAT 93', Paris (France), June 8-10, 1993SIGLEAvailable at INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.1993 n.117 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc