Assessment of 3D inhomogeneous microstructure of highly alloyed aluminium foam via dual energy K-edge subtraction imaging |
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Authors: | Qiang Zhang Hiroyuki Toda Yasutaka Takami Yoshio Suzuki Kentaro Uesugi Masakazu Kobayashi |
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Affiliation: | 1. Department of Production Systems Engineering , Toyohashi University of Technology , Aichi 441-8550, Japan;2. School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, China zhang_tsiang@hotmail.com;4. Department of Production Systems Engineering , Toyohashi University of Technology , Aichi 441-8550, Japan;5. Japan Synchrotron Radiation Research Institute (JASRI) , 1-1-1, kouto, Sayo-cho, Sayo-gun, Huogo 679-5198, Japan |
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Abstract: | X-ray microtomography was used to evaluate the inhomogeneous characteristics of newly-developed Al–Zn–Mg foam. Using the synchrotron K-edge subtraction technique, a highly heterogeneous distribution of Zn was quantified three-dimensionally (3D) in the cell wall of as-cast foam. Time-resolved analysis of the concentration evolution revealed a tendency to a homogeneous Zn distribution as solution time prolonged. This was accompanied by a declined variation in hardness measurement. Other microstructural features after solution treatment, such as number and size distribution of micropores, were also characterised. By utilising various quenching rates, the inhomogeneities in microstructure and compression properties inside the foam were also clarified. Thus, element-sensitive tomography provides a novel solution for the 3D/4D analysis in the study of foams. |
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Keywords: | metallic foam K-edge subtraction inhomogeneity element distribution mechanical properties |
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