On the Formation of Ordered ω‐phase in High Nb Containing γ‐TiAl Based Alloys

In Ti-45Al-10Nb the β/B2-phase transforms below 913 °C into B82 ordered ω-phase. During deformation of Ti-45Al-(5-7.5)Nb at 800 °C the ω/B82-phase occurs in absence of β/B2-phase on the expenses of α2-Ti3Al phase. During long term exposure to 800 °C a very slow transformation α2 into ω/B82- and γ-phase is observed. Small carbon additions hamper the formation of ω/B82-phase.