High-Energy X-rays Give Industry Affordable Way to Optimize Cast Iron (IMAGE)

DOE/Argonne National Laboratory

High-Energy X-rays Give Industry Affordable Way to Optimize Cast Iron

Caption

(a) The 2? casting block and a 2 mm diameter rod that is electrical discharge machining (EDM) cut out of the sample. (b) A typical slice of tomographic image obtained in the present study. (c) An un-etched metallography image of the same region in (b) under optical microscope (OM). (d) The reconstructed 3-D model of the graphite particles in (b). It shows that the 2-D features observed in (b and c) belong to a coral tree-like structure with flat, rounded branches that span ?200 μm in the iron matrix. (e) The left is the slicing surface and the graphite structure beneath the surface. The right side is the same CG structure but sliced in a different orientation. It shows the same feature (red arrow) could be identified as either nodular graphite (NG) or compact graphite (CG) in 2-D analysis depending on where one slices it.

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<I>Scripta Materialia</I>

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