CHESS West

Synchrotron X-Ray imaging setup for real time microradiography at A2
Goal: study of dendrite growth, remelting, coalescence, and fragmentation in real alloys in real time under controlled thermal gradients and cooling rates Technique: absorption radiography Beamline optics: Si(111), mirror, 20 KeV

Left: schematic of dendrite remelting at the high temperature (top) side of the liquid pool and solidification at the lower temperature side. Right: full field radiographic image of tertiary dendrites growing upwards along the temperature gradient and decomposing (arrows) at their lower temperature ends.
Publications: B. Li, H. D. Brody, and A. Kazimirov, “Real Time Observation of Dendrite Coarsening in Sn-13%Bi Alloy by Synchrotron Microradiography”, Phys. Rev. E., 70; 062602-1-4 (2004) B. Li, H.D. Brody, and A. Kazimirov, “Synchrotron Microradiography of Temperature Gradient Zone Melting in Directional Solidification", Metallurgical and Materials Transactions A, 37A; 1039-1044 (2006)

2008 Run

Nov 19th - Dec 22nd