Inhomogeneous plastic flow investigated by X-ray absorption microtomography of an aluminium alloy containing marker particles |
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Authors: | K HALDRUP S F NIELSEN F BECKMANN† & J A WERT |
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Affiliation: | Center for Fundamental Research: Metal Structures in Four Dimensions, RisøNational Laboratory, 4000 Roskilde, Denmark RisøNational Laboratory, Materials Research Department, 4000 Roskilde, Denmark; GKSS-Research Center Geesthacht, 21502 Geesthacht, Germany |
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Abstract: | By combining a synchrotron X‐ray source and the microtomography technique, the displacement gradient tensor components can be measured directly throughout the volume of a metal sample containing highly absorbing marker particles to detect material flow. The present article describes application of these techniques to compression of a rectangular Al–W specimen with a central hole. The results show that the externally imposed axial displacement gradient is accommodated mainly in two 45° shear bands passing through the hole. A simple deformation analysis provides insight into shear band formation. |
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Keywords: | Micro-tomography non-destructive shear bands strain measurements |
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