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采用自制悬垂式流变拉伸机研究了ＴｉＡｌ基合金全层片状组织试样的高温塑性变形行为及过程。试验结果表明，在保持较稳定的应变速率工艺下，合金在９００℃的高温变形能力达７５．５％。动态再结晶促使γ相的形成，并在一定条件下导致混晶现象的出现。锯齿状晶界与混晶现象的存在，被认为是试样拉伸断裂的主要原因。
High-temperature plastic deformation behavior and process of full-thickness TiAl-based alloy specimens were investigated by using self-made overhanging rheological stretching machine. The experimental results show that the deformation temperature of the alloy reaches 75.5% at 900 ℃ under the relatively stable strain rate. Dynamic recrystallization causes the formation of γ phase, and under certain conditions leads to the appearance of mixed crystal phenomenon. The existence of jagged grain boundary and mixed crystal phenomenon is considered to be the main reason for tensile fracture of the specimen.