Cu-Zn-Al合金贝氏体α_1相的台阶结构已经报道,台阶处的等厚条纹证实了其存在的客观性,表明该相变属扩散控制的台阶生长机制.然而,亦有文献报道α_1片的生长具有明显的切变行为.因此,该合金系贝氏体中存在的台阶结构究竟是一种偶然现象还是具有普遍意义便成为关系其相变机制的 The step structure of the bainite α_1 phase of Cu-Zn-Al alloy has been reported, and the equi-thickness stripes at the step confirm the objectivity of its existence, indicating that the phase transition is a diffusion-controlled step growth mechanism. However, The growth of the sheet has a significant shear behavior Therefore, whether the stepped structure existing in the bainite of this alloy is an accidental phenomenon or has a universal meaning becomes the mechanism of the phase transition