Pearlite is a two-phased, lamellar (or layered) structure composed of alternating layers of ferrite (87.5 wt%) and cementite (12.5 wt%) that occurs in some steels and cast irons. During slow cooling of an iron-carbon alloy, pearlite forms by a eutectoid reaction as austenite cools below 723 °C (1,333 °F) (the eutectoid temperature).

In metallurgy, pearlite is a layered metallic structure of two-phases, which compose of alternating layers of ferrite (87.5 wt%) and cementite (12.5 wt%) that occurs in some steels and cast irons. It is named for its resemblance to mother of pearl.

Pearlite: Pearlite is the name given to a mixture of about 87.5 percent ferrite and 12.5 percent cementite. It consists of alternate layers of ferrite and cementite in steel.

Pearlite is essentially a composite microstructure consisting of cementite layers (which are hard and brittle) sandwiched between ferrite layers (which are soft and ductile).

Pearlite is an eutectoid structural component of steel, which is arranged lamellarly. pearlite is a mixture of the two phases ferrite and cementite. It occurs at carbon contents of between 0.02 and 6.67 % during coupled crystallization in iron-carbon alloys.

The colours vary as a function of the apparent spacing of the lamellae at the surface, giving rise to iridescence. 1 The name pearlite is an adaptation of the fact that natural pearls that have layered structures also exhibit iridescence.

Jul 19, 2024 · Pearlite is a two-phased, lamellar (layered or plate-like) structure composed of alternating layers of alpha-ferrite and cementite that occurs in some steels and cast irons. Pearlite only forms under specialized conditions which must be controlled to create this alloy phase.

When austenite in iron-carbon alloys is transformed isothermally below the eutectoid temperature at small undercooling, it undergoes eutectoid transformation to produce a unique micro- structure termed “pearlite”, which was discovered by Sorby in 1864.

Oct 11, 2022 · Pearlite is a mixture composed of eutectoid ferrite and eutectoid cementite. It is one of the compositional phases of microscopic structure of steel, and the product of eutectoid transformation. It is usually represented by the symbol P.

Pearlite is a lamellar phase resulting from a solid–solid phase transformation in Fe–C alloys, consisting of b.c.c. ferrite and complex orthorhombic cementite components with unique interlamellar habit planes. AI generated definition based on: Encyclopedia of Materials: Science and Technology, 2001