本研究讨论了含 Mn 1.5～2.0 wt.-%的 TiAl 合金的位错特性,并将这些特性与原子比接近50:50的二元钛铝合金进行了比较。实验结果表明:由于第三元素的添加,使 TiAl 合金中 a/6[112]型不全位错的钉扎效应大大减弱,于是 a[101]和 a/2[112]型超位错的运动和孪生过程对塑性变形起重要作用,导致 TiAl 合金的延性增加。此外还用热挤压和热锻对 Mn 元素增塑 TiAl 合金的可加工性进行了评估。 This study discusses the dislocation properties of TiAl alloys containing Mn 1.5-2.0 wt .-% and compares these properties with binary titanium aluminum alloys with atomic ratios close to 50:50. Experimental results show that the pinning effect of a / 6 [112] type dislocation dislocation in TiAl alloy is greatly reduced due to the addition of the third element, and thus the movement of a [101] and a / 2 [112] And twin processes play an important role in plastic deformation, resulting in increased ductility TiAl alloy. In addition, the machinability of Mn element plasticized TiAl alloy was also evaluated by hot extrusion and hot forging.