板条状FCC/ BCC相界结构和长大机制FCC/BCC Interface Structure and Growth Mechanism of Lath\|shaped Transformation Products
王世道,俞德刚
摘要(Abstract):
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
关键词(KeyWords): FCC/BCC相界结构,错配位错,贝氏体长大机制
基金项目(Foundation):
作者(Author): 王世道,俞德刚
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