From Northwestern University Center for Atom-Probe Tomography
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3D APT of a multicomponent steel alloy

A 3-D visual reconstruction of a grain boundary found in an Fe-Cu multicomponent steel alloy specimen analyzed using a Local Electrode Atom Probe (LEAP®) from Imago Scientific Instruments. The specimen was solution treated for 40 minutes at 900 degrees Celsius and quenched in water at 25 degrees Celsius. An enhanced view of individual C, B, P, and S ions are seen in the bottom right of the figure delineating the grain boundary.