eutectoid composition

См. также в других словарях:

• hypereutectoid — “+ adjective Etymology: hyper + eutectoid 1. : containing the minor component in an amount in excess of that contained in the eutectoid 2. of steel : containing more than 0.80 percent carbon * * * /huy peuhr yoo tek toyd/, adj. Metall. 1. (of an… …   Useful english dictionary

• Pearlite — is a two phased, lamellar (or layered) structure composed of alternating layers of alpha ferrite (88 wt%) and cementite (12%) that occurs in some steels and cast irons. It forms by a eutectoid reaction as austenite is slowly cooled below 727°C.… …   Wikipedia

• hypereutectoid — /huy peuhr yoo tek toyd/, adj. Metall. 1. (of an alloy) having more of the alloying element than the eutectoid composition. 2. (of steel) having more carbon than the 0.8 percent of eutectoid steel. [1910 15; HYPER + EUTECTOID] * * * …   Universalium

• hypereutectoid alloy — for an alloy system displaying an eutectoid, an alloy for which the concentration of solute is greater than the eutectoid composition …   Mechanics glossary

• hypoeutectoid alloy — for an alloy system displaying an eutectoid, an alloy for which the concentration of solute is less than the eutectoid composition …   Mechanics glossary

• hypereutectoid — hy•per•eu•tec•toid [[t]ˌhaɪ pər yʊˈtɛk tɔɪd[/t]] adj. mel having more of the alloying element than the eutectoid composition • Etymology: 1910–15 …   From formal English to slang

• Eutectic point — The melting point of a mixture of two or more solids (such as an alloy) depends on the relative proportions of its ingredients. A eutectic or eutectic mixture is a mixture at such proportions that the melting point is as low as possible, and that …   Wikipedia

• Austenite — (or gamma phase iron) is a metallic non magnetic solid solution of iron and an alloying element. In plain carbon steel, austenite exists above the critical eutectoid temperature of 1000 K (about 727 °C); other alloys of steel have different… …   Wikipedia

• Carbon steel — Iron alloy phases Ferrite (α iron, δ iron) Austenite (γ iron) Pearlite (88% ferrite, 12% cementite) …   Wikipedia

• Lamellar structure — Lamellar structures or microstructures are composed of fine, alternating layers of different materials in the form of lamellae. They are often observed in cases where a phase transformation front moves quickly, leaving behind two solid products,… …   Wikipedia

• Phase diagram — In physical chemistry, mineralogy, and materials science, a phase diagram is a type of graph used to show the equilibrium conditions between the thermodynamically distinct phases. In mathematics and physics, a phase diagram also has an… …   Wikipedia