Mapping of local lattice parameter ratios by projective Kikuchi pattern matching
Mapping of local lattice parameter ratios by projective Kikuchi pattern matching
复制标题
通过投影菊池图案匹配映射局部晶格参数比
DOI：
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发表时间：
2018
影响因子：
3.4
通讯作者：
T. Tokarski
中科院分区：
文献类型：
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作者：
A. Winkelmann;G. Nolze;G. Cios;T. Tokarski
我们描述了一种基于晶格的晶体学近似，用于通过扫描电子显微镜中的电子背散射衍射（EBSD）分析扭曲的晶体结构。EBSD图案通过指示几何晶格平面投影的菊池带与局部晶格参数比密切相关。基于点和线在真实的投影平面上的变换性质，我们可以基于参考结构的投影变换菊池衍射模拟获得局部晶格畸变的连续估计。通过定量图像匹配的投影变换模型的晶格畸变在全立体角的可能的散射方向，我们执行一个晶体学一致的近似在拟合过程中的扭曲模拟实验观察到的衍射图案。作为一个应用实例，我们映射的局部变化的四方性的马氏体晶粒的钢。
We describe a lattice-based crystallographic approximation for the analysis of distorted crystal structures via Electron Backscatter Diffraction (EBSD) in the scanning electron microscope. EBSD patterns are closely linked to local lattice parameter ratios via Kikuchi bands that indicate geometrical lattice plane projections. Based on the transformation properties of points and lines in the real projective plane, we can obtain continuous estimations of the local lattice distortion based on projectively transformed Kikuchi diffraction simulations for a reference structure. By quantitative image matching to a projective transformation model of the lattice distortion in the full solid angle of possible scattering directions, we enforce a crystallographically consistent approximation in the fitting procedure of distorted simulations to the experimentally observed diffraction patterns. As an application example, we map the locally varying tetragonality in martensite grains of steel.
影响因子：
2.2
作者：
Britton, T. B.;Maurice, C.;Wilkinson, A. J.
通讯作者：
Wilkinson, A. J.