Correlative synchrotron absorption edge tomography and microtomography provide insights into the effect of element distribution within intermetallic phases on the fracture behaviour of cast Al-Si alloys
Scripta Materialia, vol. 247, pp. 116115
Abstract
A combined 3D investigation of elemental distribution and tensile fracture behaviour was carried out using synchrotron x-ray micro-tomography and absorption edge tomography for two near eutectic cast Al-Si-Cu-Ni alloys. Absorption edge tomography allowed the identification of intermetallics three-dimensionally based on the Cu/Ni distribution and morphology of the phases. In addition, inhomogeneities in the distributions, especially on the surface of intermetallics, were revealed by this technique. A correlation of the post-mortem state with the 3D Cu and Ni distributions showed that the main crack tends to propagate along interfaces between different types of intermetallics, while local inhomogeneities in element distribution within intermetallics acted as crack deflection sites.
Authors 5
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Katrin Bugelnig corresponding
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
Affiliation as printed
Institute for Materials Research, German Aerospace Centre, Linder Höhe, Cologne 51147, Germany
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Affiliation as printed
KS Kolbenschmidt GmbH, Karl-Schmidt-Straße, Neckarsulm 74172, Germany
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Affiliation as printed
KS Kolbenschmidt GmbH, Karl-Schmidt-Straße, Neckarsulm 74172, Germany
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Affiliation as printed
Helmholtz-Zentrum Hereon, Zentrum für Material- und Küstenforschung GmbH, Max-Planck-Straße 1, 21502, Geesthacht, Germany
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Guillermo Carlos Requena Aachen
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR) · RWTH Aachen University
Affiliation as printed
Institute for Materials Research, German Aerospace Centre, Linder Höhe, Cologne 51147, Germany
Metallic Structures and Materials Systems for Aerospace Engineering, RWTH Aachen University, Aachen 52062, Germany
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