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采用应力松弛方法，研究了Ｌｌ_２型结构Ａｌ_３Ｔｉ（＋９．７Ｆｅ）合金形变过程中形变诱导析出Ａｌ_２Ｔｉ沉淀相的现象，发现Ａｌ_２Ｔｉ析出是合金室，中温下表现为它是脆性断裂的主要原因。用ＴＥＭ方法，研究了Ａｌ_２Ｔｉ析出相与Ｌｌ_２型基体的位向关系，表明Ａｌ_２Ｔｉ的惯析面为｛１００｝面。
The stress relaxation method was used to study the phenomenon of precipitation induced precipitation of Al 2 Ti during Al_3Ti (+ 9.7Fe) alloy deformation. It is found that Al_2Ti precipitation is an alloy chamber, which is the main reason of brittle fracture at medium temperature. The orientation relationship between Al 2 Ti precipitates and Ll 2 matrix was studied by TEM, which shows that the inertial plane of Al 2 Ti is {100} plane.