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运用ＳＥＭ和ＴＥＭ等分析手段研究了ＴｉＡｌ＋Ｃａ三元合金的室温断裂行为和变形亚结构．结果表明，少量Ｃａ的添加可以大幅度提高Ｔｉ－３４％Ａｌ合金的室温力学性能．合金断裂时不再表现为单纯的穿晶解理断裂而在γ单相中出现了河流状的解理纹，断口上还出现较多的撕裂梭；ＴＥＭ分析表明，Ｃａ的添加有助于１／２＜１１０］正常位错的启动；Ｔｉ－３４％Ａｌ－１．０％Ｃａ合金压缩变形时产生大量的位错环，当Ｃａ含量达到２．０％时，在γ相中出现了由于位错分解而产生的层错．
The fracture behavior and deformation substructure of TiAl + Ca ternary alloy at room temperature were studied by means of SEM and TEM. The results show that adding a small amount of Ca can greatly improve the room temperature mechanical properties of Ti-34% Al alloy. The fracture of the alloy no longer appeared as a pure transgranular cleavage fracture, but river-shaped cleavage appeared in the γ single phase and more torn shuttle appeared on the fracture. TEM analysis showed that the addition of Ca contributed to 1/2 <110] normal dislocation; Ti-34% Al-1.0% Ca alloy produced a large number of dislocation loops during compressive deformation. When the content of Ca reached 2.0%, the γ phase appeared Fault due to dislocation.