Journal article
Measurements of plastic displacement gradient components in three dimensions using marker particles and synchrotron X-ray absorption microtomography
A universal method is presented for characterising the three-dimensional (3D) plastic displacement gradient field in bulk materials that contain particles or voids observable by X-ray tomography. Millimetre sized samples are investigated by absorption contrast microtomography using high intensity X-rays from a synchrotron source.
The positions of dispersed marker particles are determined as a function of imposed strain. The particle diameter can be in the micrometre range, and the volume fraction can be less than 1%. The method is demonstrated by evaluation of compression deformation of a cylindrical Al specimen containing W marker particles.
By interpolating the displacement gradient components determined at each particle on a 30×30×30 μm3 grid, 3D maps of the displacement gradient components are obtained with a resolution of 10−2 in each component. Limitations of the method are discussed, and the potential for application in materials science is outlined.
Language: | English |
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Year: | 2003 |
Pages: | 2407-2415 |
ISSN: | 18732453 and 13596454 |
Types: | Journal article |
DOI: | 10.1016/S1359-6454(03)00053-3 |
ORCIDs: | Fæster Nielsen, Søren and Poulsen, Henning Friis |