Non-destructive Characterization of Polycrystalline Materials in 3D by Laboratory Diffraction Contrast Tomography

  • Jette OddershedeEmail author
  • Jun Sun
  • Nicolas Gueninchault
  • Florian Bachmann
  • Hrishikesh Bale
  • Christian Holzner
  • Erik Lauridsen
Thematic Section: 3D Materials Science


Laboratory diffraction contrast tomography (LabDCT) enables the user to reconstruct three-dimensional (3D) grain maps of polycrystalline materials. For each grain, the size, orientation, and 3D morphology including the number of faces can be derived. Since the technique is non-destructive, LabDCT opens up new possibilities for studies of microstructural evolution at the level of individual grains. The LabDCT setup is integrated on a commercial X-ray microscope, enabling correlation of the resulting grain map with complimentary information on, e.g., cracks, porosities, and inclusions. Here, the LabDCT principle is introduced, and recent materials science applications are presented. The first example on liquid metal embrittlement highlights the correlation of grain boundary properties and complimentary absorption information on grain boundary wetting. It is shown that the grain boundary energy determines whether wetting occurs or not. The second example is on grain growth. The grain statistics in this study, more than 1200 grains at two different time steps, were large enough to capture rare events such as abnormal grain growth and the annihilation of a grain with only three faces.


LabDCT Non-destructive characterization Grain boundaries Microstructural evolution 



The authors would like to thank Yubin Zhang and Dorte Juul Jensen, DTU Mechanical Engineering, and Burton R. Patterson and Catherine A. Sahi, University of Florida, for providing samples and engaging in fruitful discussion during the process of the investigations documented in the present publication.

Funding Information

This work is partially funded by the Innovation Fund Denmark (IFD) under the project “Multimodal 4D Characterization of Materials in the Laboratory” (case number: 5190-00044B).

Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no conflict of interest.


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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Xnovo Technology ApSKøgeDenmark
  2. 2.Carl Zeiss X-ray Microscopy Inc.PleasantonUSA

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