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[021]取向的γ—TiAl单晶（Ti—56％Al,原子分数）在－196－1000℃温度范围内压缩变形时主要形变方式为｛111｝（110］普通位错的滑移低温时，（1／2）（110］普通位错大多沿螺型及60°交角两种方向排列，井倾向于成组出现；而在反常屈服温度区域内，（1／2）（110］普通位错大多平行于其螺型方向，且形成许多位错拐点，其数目随温度的升高而增加；在反常屈服峰温以上，普通位错不具有特殊的方向性，且倾向于通过攀移向其它滑移面运动
The main deformation mode of the oriented γ-TiAl single crystal (Ti-56% Al, atomic fraction) during the compressive deformation in the temperature range of -196-1000 ℃ is the {111} slip of ordinary dislocation , (1/2) (110) Ordinary dislocations are mostly arranged in both directions of spiral and 60 °, and wells tend to appear in groups. In the region of abnormal yield temperature, (1/2) (110) normal Most of the faults are parallel to the screw direction and form many dislocation inflection points, the number of which increases with temperature. Above the abnormal yield peak temperature, ordinary dislocations do not have a special directionality and tend to climb by climbing Other sliding surface movement