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通过三点弯曲预裂纹试样在室温（２５ ℃）和 ７００ ℃的断裂试验，对接近 γ和全层状 α＋ γ的两种 Ｔｉ Ａｌ金属间化合物的解理断裂行为进行了研究．经过断口的详细观察和裂纹尖端应力、应变的有限元计算确定解理断裂的临界阶段．结果表明解理断裂是由预制裂纹的直接扩展所引发，由加工硬化决定的裂尖处的正应力是决定性的控制因素．
The cleavage and fracture behaviors of two TiAl intermetallic compounds close to γ and full-layered α + γ were studied by three-point bending pre-cracked specimens at room temperature (25 ℃) and fracture at 700 ℃. Through the detailed observation of the fracture and the crack tip stress and strain, the finite element calculation determines the critical stage of cleavage fracture. The results show that the cleavage fracture is caused by the direct expansion of prefabricated cracks. The normal stress at the crack tip determined by work hardening is the decisive factor.