Spectral neutron tomography

Materials Today Advances

D. Penumadu¹  W. Kockelmann²  H. Markötter²  R. Woracek³  N. Kardjilov⁴  A. Hilger⁵  J. Kelleher⁶  A.S. Tremsin⁶  S.B. Puplampu⁶  K.V. Tran⁶  J. Banhart⁷  I. Manke⁷ 

[1] Bundesanstalt für Materialforschung und -Prüfung, Unter Den Eichen 87, 12205, Berlin, Germany;Corresponding author.;Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany;Thuyloi University, 175 Tay Son, Dong Da, Hanoi, Viet Nam;European Spallation Source ESS ERIC, SE-221 00, Lund, Sweden;Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109, Berlin, Germany;STFC-Rutherford Appleton Laboratory, ISIS Facility, Harwell, OX11 0QX, UK;

关键词: 4D tomographic data;    Multi-energy CT;    Spectral CT;    Phase distribution;    Bulk sample;    Full-field phase tomography;   

DOI  :  

来源: DOAJ

【 摘 要 】

Combined three-dimensional (3D) mapping of (micro-)structures with elemental and crystalline phase variations is of significant importance for the characterization of materials. Neutron wavelength selective imaging is a spectral imaging technique that exploits unique contrast differences e.g. for mapping dissimilar elemental, isotope, or phase compositions, and has the particular advantage of being applicable to sample volumes on the meso- and macroscale. While being mostly applied as radiography (2D) so far, we herein report that the extension to tomography allows for the display of the full spectral information for every voxel and in 3D. The development is supported by example data from a continuous as well as a pulsed neutron source. As a practical example, we collected 4D data sets (3D + spectral) of plastically deformed metastable stainless steel and herein demonstrate an improved quantification strategy for crystalline phase fractions. These exemplary results illustrate that localized phase transformations can be quantified even in complex geometries within centimeter-sized samples, and we will discuss the limits and future prospects of the technique that is not limited to crystalline materials.

【 授权许可】

Unknown