Time-resolved x-ray imaging of aluminum alloy solidification processes |
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| Authors: | Ragnvald H Mathiesen Lars Arnberg Kjell Ramsøskar Timm Weitkamp PhD Student Christoph Rau Anatoly Snigirev |
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| Affiliation: | (1) SINTEF Materials Technology, N-7465 Trondheim, Norway;(2) Department of Electrochemistry and Metallurgy, the Norwegian University of Science and Technology, N-7491 Trondheim, Norway;(3) Department of Physics, the Norwegian University of Science and Technology, N-7491 Trondheim, Norway;(4) the Experiments Division, ESRF, F-38043 Grenoble, France |
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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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