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通过对Ｔｉ－３３Ａｌ－３Ｃｒ－０．５Ｍｏ（ｗｔ％）合金在９００℃高温拉伸时的变形特性、显微组织变化及断口形貌的研究，发现ＴｉＡｌ基合金高温变形主要是通过等轴相晶粒内的位错滑移、晶界滑移和层片晶团（Ｌ）中层片间的相对滑移来进行的；相晶粒在变形过程中发生周期性的动态再结晶并引起流变应力周期性波动；层片状晶团与晶粒变形的非协调性导致孔洞在Ｌ／界面形核、长大并相互连通使合金最后断裂。
Through the study of deformation, microstructure and fracture morphology of Ti-33Al-3Cr-0.5Mo (wt%) alloy at 900 ℃ high temperature, it was found that the deformation of TiAl-based alloy is mainly caused by the equiaxial phase Dislocation slip within the grain, grain boundary slip and relative slip between the plies in the lamella (L); the phase grains undergo periodic dynamic recrystallization during deformation and cause rheological The periodic fluctuation of stress; the non-coordination of lamellar grains and grain deformation led to nucleation, growth and interconnection of holes in the L / interface to finally rupture the alloy.