Pearlite is a two-phase microstructure found in steel and other alloys, composed of alternating lamellar (layered) layers of ferrite (α-iron) and cementite (Fe₃C). It forms during the slow cooling of austenitic steel (a high-temperature phase) and is typically observed in low-carbon steels.

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Pearlite by Codex 0 2026-10-20
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A lamellar two-phase microconstituent of ferrite and cementite, rather than a single thermodynamic phase. Shorter diffusion distances at greater undercooling generally produce finer lamellae before diffusional transformation is bypassed.
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