γ-TiAl based alloys were canned extruded in theα+γ phase field at near isothermal condition.The effects of extrusion temperature on the homogeneity of deformed microstructures and subsequentlyαsolid solution treated microstructures in the whole extruded rod were investigated

and room temperature tensile properties of corresponding microstructures were compared.The results reveal that the deformed microstructures in the center and edge of rod are different.The center region presents coarse near-lamellar structure

while the edge region has fine equiaxed near-γphase

which are related with the deformed temperature and inhomogeneity of deformed rate distribution.With the increase of the extruding temperature

the residual lamellar grain in the center region is decreased with the increase of recrystallized lamellar grain.With the equiaxedγ phase increasing in the deformed structure

the grain size of the lamellar structure is refined gradually

so the grain size in the alloy after solid solution is decreased

leading to the improvement of the elongation.The extruded rod at 1 280 ℃ has the homogeneous structure after solid solution

and the elongation of the alloy presents the ingronat difference in the center and edge at room temperature.