Experimental measurement of surface strains and local lattice rotations combined with 3D microstructure reconstruction from deformed polycrystalline ensembles at the micro-scale
Experimental measurement of surface strains and local lattice rotations combined with 3D microstructure reconstruction from deformed polycrystalline ensembles at the micro-scale
复制标题
表面应变和局部晶格旋转的实验测量与微尺度变形多晶系综的 3D 微结构重建相结合
DOI：
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发表时间：
2013
影响因子：
3.3
通讯作者：
M. Uchic
中科院分区：
文献类型：
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作者：
P. Shade;M. Groeber;J. Schuren;M. Uchic
本文描述了一种新的方法来表征多晶金属的变形响应使用新的微尺度实验方法的组合。采用原位扫描电镜（SEM）拉伸测试系统，对微尺度多晶试样进行了适度和中等塑性变形试验。这些测试包括在样品表面以纳米尺度分辨率测量局部位移场。测试结束后，进行了结合电子背散射衍射映射的聚焦离子束连续切片实验，以表征变形微尺度测试样品内部的三维晶粒结构和局部晶格旋转。这种实验的结合使得局部表面位移和内部晶格旋转与潜在的三维多晶微观结构直接相关，这些信息可用于验证和指导建模和仿真方法的进一步发展，以预测多晶系整体的局部塑性变形响应。
This article describes a new approach to characterize the deformation response of polycrystalline metals using a combination of novel micro-scale experimental methodologies. An in-situ scanning electron microscope (SEM)-based tension testing system was used to deform micro-scale polycrystalline samples to modest and moderate plastic strains. These tests included measurement of the local displacement field with nm-scale resolution at the sample surface. After testing, focused ion beam serial sectioning experiments that incorporated electron backscatter diffraction mapping were performed to characterize both the internal 3D grain structure and local lattice rotations that developed within the deformed micro-scale test samples. This combination of experiments enables the local surface displacements and internal lattice rotations to be directly correlated with the underlying 3D polycrystalline microstructure, and such information can be used to validate and guide further development of modeling and simulation methods that predict the local plastic deformation response of polycrystalline ensembles.