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魏氏铁素体、上贝氏体和板条马氏体均是过冷奥氏体板条状相变产物，它们的ＦＣＣ／ＢＣＣ相界都接近（１１１）ｆ密排面。本文用高分辨电镜在原子尺度上观察证实了板条马氏体相界台阶—位错结构，结合相变晶体学改进了板条马氏体和魏氏铁素体相界结构模型，这两个模型代表了（１１１）ｆ／（０１１）ｂ原子界面外延匹配可能的位错配置类型，同它们各自的长大动力学相容。贝氏体不可能有上述二者之外的相界结构，应通过试验确定，它属于上述两种模型中哪一种。文中研究表明，结合相变晶体学精确地实验和分析贝氏体相界结构，并借以考察其长大本质至关重要
Ferrite, upper bainite and lath martensite are all supercooled austenite lath-like phase transformation products, and their FCC / BCC phase boundaries are close to the (111) f meso-row. In this paper, high-resolution electron microscopy was observed at the atomic scale confirmed lamellar martensite phase step - dislocation structure, combined with phase transition crystallography improved lath martensitic and Wei’s ferrite phase boundary structure model, the two The models represent possible dislocation configurations for (111) f / (011) b atomic-interface epitaxial matching, compatible with their respective growth kinematics. It is not possible for bainite to have a phase boundary structure other than the above two, and it should be determined experimentally, which belongs to either of the above two models. The study shows that it is very important to combine the phase transition crystallography to experimentally and precisely analyze the phase boundary structure of bainite and to study its growth and essence