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根据对钛铝合金铸态组织的金相观察，分析了合金元素Ｃｒ，Ｖ，Ｎｂ对铸锭组织的影响。研究发现，合金元素Ｃｒ，Ｖ有利于柱状晶生长，在这种柱状晶组织中γ／α２层片排列具有较强的择优取向，即层片界面垂直于柱状晶生长方向；而Ｎｂ抑制柱状晶生长，且含Ｎｂ的ＴｉＡｌ合金宏观等轴晶区和柱状晶区内层片组织均由等轴状的层片团构成，并以四点弯曲试验结果对不同合金化条件的钛铝合金的力学性能的方向性做了评价。
Based on the metallographic observation of the as-cast Ti-Al alloy, the effects of alloying elements Cr, V and Nb on ingot structure were analyzed. It is found that alloying elements such as Cr and V are favorable for the growth of columnar grains. In this kind of columnar grains, the γ / α2 lamellae have a strong preferred orientation, ie, the interface of the lamellae is perpendicular to the growth direction of the columnar grains. Nb inhibits the columnar grains Growth, and the Nb-containing TiAl alloy macroscopic equiaxed zone and columnar zone inner layer structure by the equiaxed lamellar composition, and four-point bending test results for different alloying conditions of titanium aluminum alloy mechanics The direction of performance has been evaluated.