利用透射电子显微术对Ｔｉ－５６％Ａｌ（原子分数）单晶变形亚结构中位错的滑移特性进行了研究．结果表明：γ－ＴｉＡｌ相单晶在室温下，沿［１１２］方向受力产生的可动位错系为｛１１１｝１／２〈１１２］型超位错，位错滑移方向为〈１１０］或〈１３２］；位错线轴向处于〈１１０］或〈１３２］方向的部分由于受到Ｐｅｉｅｒｌｓ应力势的限制而变为难滑移部分，位错继续运动的结果导致在平行于这些方向上形成２条长直的位错对 The slip properties of dislocations in the Ti-56% Al (atomic fraction) single crystal deformation substructure were studied by transmission electron microscopy. The results show that the γ-TiAl single-crystal is subjected to {111} 1/2 <112] type super-dislocations under the force of [112] at room temperature, and the dislocation slip direction is <110 ] Or <132]; the portion of the dislocation line axis in the <110] or <132] direction becomes a less slippery portion due to Peierls stress constraints and the result of the continued motion of the dislocations results in formation in parallel to these directions Two long straight dislocation pairs