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In situ observations by synchrotron white beam X-ray topography of the planar, cellular and dendritic growths of a binary alloy

Real-time X-ray topography using white beam synchrotron radiation has been applied to a study of the planar, cellular and dendritic growths of an Al 0.73 wt.% Cu alloy. In situ observations have revealed two different destabilization modes of the solidification front and have provided information on the microstructures obtained by cellular and dendritic growth.