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研究了两种不同组织的ＴｉＡｌ合金在较低温度下的超塑性行为。结果表明， 原始显微组织对ＴｉＡｌ基合金的超塑性有很大影响， 其中非平衡的热变形态组织在１０７５℃，８×１０－ ５ｓ－ １ 条件下获得了５１７％ 的延伸率，远高于平衡双态组织（３３３％ ）。分析认为， 非平衡态组织中的高的位错密度使其在高温变形过程中容易发生位错缠结， 由此产生的硬化效应能促使缩颈转移， 从而获得高延性。
The superplastic behavior of TiAl alloys at two different temperatures at relatively low temperatures was investigated. The results show that the original microstructure has a great influence on the superplasticity of the TiAl-based alloy. The non-equilibrium thermal deformation microstructure obtained 517% elongation at 1075 ℃ and 8 × 10-5 s-1, In balanced binary states (333%). The analysis shows that high dislocation density in non-equilibrium structure makes dislocation entanglement easy to occur during high temperature deformation, and the hardening effect can promote the necking, so as to obtain high ductility.