pearlite definition

  • noun:
    • A mixture of ferrite and cementite forming distinct levels or groups in slowly cooled carbon steels.
    • Variant of perlite.
    • A two-phased lamellar structure consists of alternating levels of alpha ferrite and cementite that occurs in a few steels and cast irons, having a pearlescent appearance.
    • alternate kind of perlite.
    • A glassy volcanic rock of a grayish shade and pearly luster, frequently having a spherulitic concretionary structure as a result of the curved cracks generated by contraction in air conditioning. See Illust. under perlitic.
    • The eutectoid of metal.
    • a lamellar blend of cementite and ferrite formed through the air conditioning of austenite; a constituent of steel and cast-iron

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