利用高分辨电镜(HREM)观察了Ti-45Al-10Nb(原子分数,%)合金α2+γ层状结构中的ω相.发现ω相与α2和γ片层存在着取向关系[0001]ω∥(1120〉α2∥(110〉γ,{1120}ω∥(0002)α2∥{111}γ.同时,观察到在片层中具有B82结构的ω相进-步转变为D88结构的ω*相.片层中可能存在着α2→ω的直接转变.
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