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Time-resolved x-ray imaging of aluminum alloy solidification processes

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Abstract

Time-resolved direct-beam X-ray imaging, with intense, coherent, and monochromatic third-generation synchrotron radiation, and a high-resolution fast-readout detector system have been used for in-situ studies of dendritic and eutectic growth processes in Al-Cu alloys. Temporal and spatial resolutions down to 0.25 seconds and 2.5 μm, respectively, were obtained with a field of view up to 1.4×1.4 mm2. Solid-liquid interfaces and various phase-specific segregates could be observed, and their dynamics could be traced in a sequence of temporally resolved images formed by phase and amplitude contrast from the sample. This article does not present any detailed analysis of a specific solidification phenomenon; instead, it presents to the scientific community an innovative technique for in-situ monitoring of such a phenomenon in real metallic systems.

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Authors and Affiliations

  1. SINTEF Materials Technology, N-7465, Trondheim, Norway

    Ragnvald H. Mathiesen (Research Scientist)

  2. Department of Electrochemistry and Metallurgy, the Norwegian University of Science and Technology, N-7491, Trondheim, Norway

    Lars Arnberg (Professor)

  3. Department of Physics, the Norwegian University of Science and Technology, N-7491, Trondheim, Norway

    Kjell Ramsøskar (Retired Research Scientist)

  4. the Experiments Division, ESRF, F-38043, Grenoble, France

    Timm Weitkamp Ph.D. Student, Christoph Rau (Postdoctor) & Anatoly Snigirev (Beamline Scientist)

Authors
  1. Ragnvald H. Mathiesen
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  2. Lars Arnberg
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  3. Kjell Ramsøskar
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  4. Timm Weitkamp Ph.D. Student
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  5. Christoph Rau
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  6. Anatoly Snigirev
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Mathiesen, R.H., Arnberg, L., Ramsøskar, K. et al. Time-resolved x-ray imaging of aluminum alloy solidification processes. Metall Mater Trans B 33, 613–623 (2002). https://doi.org/10.1007/s11663-002-0041-2

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  • DOI: https://doi.org/10.1007/s11663-002-0041-2

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