Three-dimensional visualization of dislocation-precipitate interactions in a Al-4Mg-0.3Sc alloy using weak-beam dark-field electron tomography
Three-dimensional visualization of dislocation-precipitate interactions in a Al-4Mg-0.3Sc alloy using weak-beam dark-field electron tomography
复制标题
DOI：
10.1557/jmr.2010.83
复制
发表时间：
2011-02-01
影响因子：
2.7
通讯作者：
Robertson, I. M.
中科院分区：
文献类型：
--
作者：
Liu, G. S.;Robertson, I. M.
弱光束暗场图像的位错与粒子相互作用，在一个大的角度范围内获得的被用来重建断层图像，然后被用来作为基础，构建一个三维（3D）模型的位错结构。这些能力有助于从不同方向观察位错结构，恢复在电子束方向上丢失的信息。耦合这些功能和方法，包括在其中与传统的位错分析的试样坐标系，使在三维的位错微观结构的全面表征。这种方法是用来理解的3D本质的位错和扭曲边界的相互作用与Al 3Sc颗粒在Al-Mg-Sc合金。
Weak-beam dark-field images of dislocations interacting with particles acquired over a large angular range were used to reconstruct tomograms, which were then used as the basis to construct a three-dimensional (3D) model of the dislocation structure. These capabilities facilitate viewing the dislocation structure from different directions, recovering the information lost in the electron beam direction. Coupling these capabilities and a method to include the specimen coordinate system within them with conventional dislocation analysis enables a full characterization of the dislocation microstructure in three dimensions. This approach is used to understand the 3D nature of the interaction of dislocations and a twist boundary with Al3Sc particles in an Al-Mg-Sc alloy.