Study of Ti-48Al alloy : Effect of cooling rate, mechanical properties

F. Perdrix; M.-F. Trichet; J.-L. Bonnentien; M. Cornet; J. Bigot

doi:doi:10.1051/jp4:2000430

Issue		J. Phys. IV France Volume 10, Number PR4, March 2000 42^e Colloque de Métallurgie de l'INSTN Matériaux pour les machines thermiques


Page(s)		Pr4-223 - Pr4-228
DOI		https://doi.org/10.1051/jp4:2000430

42^e Colloque de Métallurgie de l'INSTN
Matériaux pour les machines thermiques

J. Phys. IV France 10 (2000) Pr4-223-Pr4-228
DOI: 10.1051/jp4:2000430

Study of Ti-48Al alloy : Effect of cooling rate, mechanical properties

F. Perdrix, M.-F. Trichet, J.-L. Bonnentien, M. Cornet and J. Bigot

Centre d'Études de Chimie Métallurgique, CNRS, 15 rue Georges Urbain, 94407 Vitry-sur-Seine cedex, France

Abstract
The microstructure of a Ti-48Al alloy solution treated in the α-field is influenced by the cooling rate. The study of cooling curves permit us to determine expenmentally the CCT diagram, and to show that the higher the cooling rate the lower is the temperature of the α → γ transformation start. The evolution of parameters that characterise the lamellar structure has been determined according to the cooling rate. When this one increases, α₂-volume fraction increases, width of α₂ and interlamellar spacing decrease. The values of yield stress also increased and were all the less scattered as the structure became more perfectly lamellar.