False col SEM of carbon steel

False col SEM of carbon steel

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Credit: MIKE MCNAMEE/SCIENCE PHOTO LIBRARY

Caption: False-colour scanning electron micrograph of a 0.87 percent carbon steel with a pearlitic microstructure of thin platelets. Such a steel is about 10 times stronger than pure iron, & a variety of heat- treatment processes can be used to tailor it to the physical properties required by an engineer. The platelets appear as bright strips because they are viewed end-on; they consist of alternating sheets of iron carbide or cementite & pure iron or ferrite. The platelet structure is formed by the carbon being rejected from the atomic structure as the steel cools. Polished section, Nital etch. Magnification: x465 at 35mm size. Gold tint. Ref: MICROCOSMOS, fig. 7.33, page 142

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Keywords: alloy, cementite, chemical, chemistry, compound, compounds, ferrite, iron carbide, pearlitic steel, steel

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