Correlation of X-Ray Dark-Field Radiography to Mechanical Sample Properties
Correlation of X-Ray Dark-Field Radiography to Mechanical Sample Properties
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DOI：
10.1017/s1431927614001718
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发表时间：
2014-07
影响因子：
2.8
通讯作者：
A. Malecki;E. Eggl;F. Schaff;G. Potdevin;T. Baum;Eduardo Grande Garcia;J. Bauer;F. Pfeiffer
中科院分区：
文献类型：
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作者：
A. Malecki;E. Eggl;F. Schaff;G. Potdevin;T. Baum;Eduardo Grande Garcia;J. Bauer;F. Pfeiffer
摘要用X射线光栅干涉法获得的方向性暗场信号产生了与被测样品内部发生的X射线散射有关的方向相关信息。它允许检查其形态，而不需要解析直接导致散射的微米级结构。局部形态反过来又导致了所研究的试件的宏观力学性能。在这项研究中，我们研究了生物力学弹性(杨氏模数)与测量的方向暗视野参数之间的关系，明确的木材制成的样品。在我们的原理证明实验中，我们发现杨氏模数、平均暗场信号和平均暗场各向异性之间存在关联。因此，我们能够证明定向暗场成像是一种预测样品力学性质的新方法。由于光栅干涉术同时提供吸收、相位对比度和暗场数据，这项技术似乎有望在单一测试阶段将成像和机械测试结合起来。因此，我们相信定向暗场成像将在材料科学界产生重大影响。
Abstract The directional dark-field signal obtained with X-ray grating interferometry yields direction-dependent information about the X-ray scattering taking place inside the examined sample. It allows examination of its morphology without the requirement of resolving the micrometer size structures directly causing the scattering. The local morphology in turn gives rise to macroscopic mechanical properties of the investigated specimen. In this study, we investigate the relation between the biomechanical elasticity (Young’s modulus) and the measured directional dark-field parameters of a well-defined sample made of wood. In our proof-of-principle experiment, we found a correlation between Young’s modulus, the average dark-field signal, and the average dark-field anisotropy. Hence, we are able to show that directional dark-field imaging is a new method to predict mechanical sample properties. As grating interferometry provides absorption, phase-contrast, and dark-field data at the same time, this technique appears promising to combine imaging and mechanical testing in a single testing stage. Therefore, we believe that directional dark-field imaging will have a large impact in the materials science world.