Rich tomography techniques for the analysis of microstructure and deformation
Rich tomography techniques for the analysis of microstructure and deformation
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DOI：
10.1142/s0219876213430068
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发表时间：
2014-06
影响因子：
1.7
通讯作者：
N. Baimpas;M. Xie;Xu Song;F. Hofmann;B. Abbey;James Marrow;M. Mostafavi;J. Mi;A. Korsunsky
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文献类型：
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作者：
N. Baimpas;M. Xie;Xu Song;F. Hofmann;B. Abbey;James Marrow;M. Mostafavi;J. Mi;A. Korsunsky
直到最近，物质世界的三维性在表征、数据处理、可视化和建模方面提出了许多挑战。因此，截面、投影或表面的2D表示仍然是最流行的成像技术的支柱，例如光学和电子显微镜以及X射线照相术。然而，具有更大存储容量的更快计算机的出现确保了现在不仅可以有效地存储和操作大型3D矩阵，而且可以使用诸如代数重建技术（ART）的高级算法来解释包含通过一些合适的分析测量技术获得的对象的多个投影或平均值的冗余数据集。这些工具为数值模拟提供了前所未有的机会。模型制定可以在微观结构信息3D成像的基础上半自动完成，而模型验证可以通过直接比较复杂量的3D图来实现，例如位移矢量或应变张量分量。在本文中，我们回顾了几种模式，什么可以被称为“丰富”的层析成像：应变层析成像在大部分的承载结构部件;劳厄取向层析成像的非破坏性映射的晶粒取向内的多晶，并使用序列的层析重建的数字体积相关（DVC）分析原位变形。
Until very recently, the three-dimensionality of the material world presented numerous challenges in terms of characterization, data handling, visualization, and modeling. For this reason, 2D representation of sections, projections, or surfaces remained the mainstay of most popular imaging techniques, such as optical and electron microscopy and X-ray radiography. However, the advent of faster computers with greater memory capacity ensured that large 3D matrices can now not only be stored and manipulated efficiently, but also that advanced algorithms such as algebraic reconstruction techniques (ART) can be used to interpret redundant datasets containing multiple projections or averages across the object obtained by some suitable analytical measurement technique. These tools open up unprecedented opportunities for numerical simulation. Model formulation can be accomplished semi-automatically on the basis of microstructurally-informed 3D imaging, while model validation can be achieved by direct comparison of 3D maps of complex quantities, such as displacement vectors or strain tensor components. In this paper, we review several modalities of what can be referred to as "rich" tomography: strain tomography in the bulk of a load bearing structural component; Laue orientation tomography for nondestructive mapping of grain orientation within a polycrystal, and the use of sequences of tomographic reconstructions for digital volume correlation (DVC) analysis of in situ deformation.