Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
J. Phys. IV France 03 (1993) C7-465-C7-468
TEM investigation of rapidly quenched metastable γ TiAl phasesG. SHAO, T. GROSDIDIER and P. TSAKIROPOULOS
Department of Materials Science and Engineering, University of Surrey, Guildford Surrey GU2 5XH, U.K.
The microstructural characteristics of rapidly solidified Ti-48.8at%Al-2.2at%V thin ribbons have been studied. Different forms of the γ phase were observed and disordered γ is reported for the first time. Thermal APBs associated with the ordering process were observed. α2-free domains consisting of Ll0 γ laths were also investigated. Within the domains, the parallel γ laths are at 90° to one another around <1 0 0>.
© EDP Sciences 1993