Three-dimensional (3D) morphology and growth behavior of ferrite formed at intragranular inclusions in low-carbon steel were studied by serial sectioning and computer-aided visualization. The specimens taken from the weld deposit were austenitized and isothermally reacted for varying times. The length, width, and thickness of ferrite plates were measured from 3D-reconstructed images. From the length-to-width ratio, the morphology of ferrite is likely to be a lath rather than a plate in this alloy. Multivariant ferrite plates
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