研究表明双相TiAl基合金高温变形后γ相中的位错呈弯曲状[1]。对TiAl-PST晶体变形结构的进一步研究表明,(1/2)[110]位错通过频繁的交滑移形成三维缠结[2]。Jimenez等[3]通过改变应变速率压缩实验研究了双相TiAl基合金的高温(800～1100℃)变形行为,认为在高流变应力和低温度区间 The research shows that the dislocations in the γ phase of the dual-phase TiAl-based alloy are curved after the high temperature deformation [1]. Further studies of the deformed structure of TiAl-PST crystals show that (1/2) [110] dislocations form three-dimensional entanglements by frequent cross slip [2]. Jimenez et al. [3] studied the deformation behavior of dual-phase TiAl-based alloys at high temperatures (800 ~ 1100 ℃) by changing the compressive strain rate. It is considered that in the high flow stress and low temperature range