How To Use Pearlite In A Sentence
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When cooled slowly below 670 degrees, martensite yields a heterogeneous mixture of pearlite and ferrite (or cementite, if the original mixture contained between 0.8 per cent. and two per cent. of carbon).
Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86
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Ductility and impact properties are principally determined by the proportions of ferrite and pearlite in the matrix.
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At faster cooling rates, however, the microstructure almost fully transforms into martensite; increasing from approximately 15\% martensite, 85\% bainite / pearlite to 87\% martensite, 13\% bainite / pearlite at the highest cooling rate, based on a point-count method.
Machine Design -
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Holding in the lower pearlite range accelerates subsequent transformation to bainite.
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It is important to note that higher silicon contents can promote pearlite and may increase the nickel requirement.
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In the ordinary practice of hardening steels, the quenching is not so drastic, and the transformation of austenite back to ferrite and cementite is more or less completely effected, giving rise to certain transitory forms which are known as "martensite," "troostite," "sorbite," and finally, pearlite.
The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel
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At that moment, in fact, the ferrite, cementite or pearlite which previously existed has lost its identity by everything going into the solid solution called austenite.
The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel
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For the high-silicon nodular irons, high-temperature heat treatment is advised in all cases to anneal any pearlite and stabilize the casting against growth in service.
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The properties obtained subsequently depend on the coarseness of the pearlite and ferrite and their relative distribution.
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As described in the previous section, alloying must be sufficient to ensure that a pearlite-free microstructure is obtained in heat treatment.
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The dark grains are pearlite, separated by white films of iron carbide (cementite).
The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel
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Perhaps the most familiar structure in steels is that of the eutectoid pearlite, usually a lamellar mixture of ferrite and cementite.
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At that moment, in fact, the ferrite, cementite or pearlite which previously existed has lost its identity by everything going into the solid solution called austenite.
The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel
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The matrix microstructures resulting from heat treatment can vary from ferrite-pearlite to tempered martensite.
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When cooled slowly below 670 degrees, martensite yields a heterogeneous mixture of pearlite and ferrite (or cementite, if the original mixture contained between 0.8 per cent. and two per cent. of carbon).
Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86
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The austenite-pearlite reaction Pearlite is probably the most familiar micro structural feature in the whole science of metallography.
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He suggested to me a theoretical problem left over from his work during the war on the cooling of steel through the austenite-pearlite transition, and I learned a fair amount of metallurgy in order to understand the physical basis of the phenomenon.
Aaron Klug - Autobiography
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This structure of thin sheets has received the name "pearlite," because of its pearly appearance under sunlight.
The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel
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This reduces the amount of pearlite and improves toughness, ductility, and weldability.
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Slide 8: Figure 12.3 Electron micrographs of (a) pearlite, (b) bainite, and (c) tempered martensite, illustrating the differences in cementite size and shape among these three microconstituents ( 7500).
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Higher carbon steels show films of cementite outlining grains of pearlite (Fig. 48).
The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel
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It is important to limit nickel content to the level needed for control of pearlite; excess nickel increases the amount of retained austenite and lowers hardness.
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The name perlite (also spelled pearlite) comes from the French word perle which means pearl, in reference to the “pearly” luster of classic perlite.
Perlite
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The name perlite (also spelled pearlite) comes from the French word perle which means pearl, in reference to the "pearly" luster of classic perlite.
Featured Articles - Encyclopedia of Earth
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The pearlite is responsible for substantial strengthening.
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When cooled slowly below 670 degrees, martensite yields a heterogeneous mixture of pearlite and ferrite (or cementite, if the original mixture contained between 0.8 per cent. and two per cent. of carbon).
Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86
-
In the ordinary practice of hardening steels, the quenching is not so drastic, and the transformation of austenite back to ferrite and cementite is more or less completely effected, giving rise to certain transitory forms which are known as "martensite," "troostite," "sorbite," and finally, pearlite.
The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel
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The structure is illustrated in Fig.4 from the Cast Iron article which shows the structure of the phosphide eutectic, together with graphite, ferrite and pearlite.
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The cementite, although adding to the tensile strength, is very brittle and the strength of the pearlite is the combination of the ferrite and cementite.
The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel
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The name perlite (also spelled pearlite) comes from the French word perle which means pearl, in reference to the “pearly” luster of classic perlite.
Perlite
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The name perlite (also spelled pearlite) comes from the French word perle which means pearl, in reference to the "pearly" luster of classic perlite.
Featured Articles - Encyclopedia of Earth
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The structure now consists of free cementite and pearlite.
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Any of these operations not only allows the transformations from austenite to pearlite to proceed, but also relieves internal stresses in the steel.
The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel
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If the steel be then cooled, the austenite breaks up into new crystals of ferrite, cementite and pearlite; and in general if the temperature has not gone far above the critical, and cooling is not excessively slow, a very fine texture will result.
The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel
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The name perlite (also spelled pearlite) comes from the French word perle which means pearl, in reference to the "pearly" luster of classic perlite.
Featured Articles - Encyclopedia of Earth
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The results show that the microstructure of Fe-Si-Mn cast steels can be remarkably changed through magnetic field treatment, from a mixture structure to only one pearlite or martensite structure.
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He suggested to me a theoretical problem left over from his work during the war on the cooling of steel through the austenite-pearlite transition, and I learned a fair amount of metallurgy in order to understand the physical basis of the phenomenon.
Aaron Klug - Autobiography
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Tiny white granules of pure iron (ferrite) have small accumulations of dark-etching pearlite interspersed between them.
The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel
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The harder pearlite is comprised of alternating thin layers or shells of ferrite and cementite, a very hard substance.
