【摘要】 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。更多还原

【Abstract】 The precipitaion of Al2Ti induced by strain was studied by means of stress-relax method during deformation of Ll2 structure Al3Ti(+9.7Fe)alloy.It is shown that the Al2Ti precipitatings is the principal reason for the ductile fracture of Al3Ti base alloy at room or middle temperature.By TEM,it is proved that the Al2Ti precipitation has rigorous crystal orientation relationship with Al3Ti matrix,{100}p∥{100}m.更多还原