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根据Ni-Fe-Cr-Nb合金中γ″和γ的取向关系,引出γ和γ″的复合倒易空间,导出其指数变换矩阵和指数变换关系,简化了γ和γ″合成电子衍射谱的分析。由得到的(U′V′W)_(γ″)和(UVW)_γ上的倒易阵点相重规律,选择适当的晶带衍射来判定三种取向γ″成核与否。注意γ″基本衍射在基体衍射或其周围引起的条纹花样或“卫星”斑点,有助于判断各种取向γ″的存在。阐明了导出相应于各种等效取向关系的变换矩阵。
According to the orientation relation between γ “and γ in Ni-Fe-Cr-Nb alloy, the composite reciprocal space of γ and γ” leads to its exponential transformation matrix and exponential transformation relationship, which simplifies the synthesis of γ and γ “ From the obtained reciprocal laws of the reciprocal lattice points on (U’V’W) _ (γ ”) and (UVW) _γ, we choose the proper zone diffraction to determine whether the three orientations γ“ nucleate or not. Note that ”γ“ basic diffraction causes streak patterns or ”satellite“ spots on or around the substrate to help determine the existence of various orientations γ ”, and to derive the transformation matrix corresponding to various equivalent orientation relationships.