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Fe, C 0.8 (wt%) steel, eutectoid transformation, spheroidised

Description

This steel is of the eutectoid composition. Once the temperature is lowered below the eutectoid temperature, the austenite phase tends to undergo a eutectoid transformation (γ to α + Fe3C). The resultant microstructure, known as pearlite, comprises alternate lamellae of cementite and ferrite. Subsequent to casting, the alloy was normalised (annealed) just below the eutectoid temperature, in order to induce the carbides to take a spherical appearance, which results in the steel becoming softer and more ductile. This is known as spheroidisation. The changes to the morphology of the cementite cannot be seen clearly in this micrograph, but they are discernible at higher magnification (see micrographs 266 and 267).

Subjects

alloy | carbon | iron | metal | normalising | spheroidised | steel | doitpoms | university of cambridge | micrograph | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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Fe, C 0.8 (wt%) steel, eutectoid transformation, spheroidised

Description

This steel is of the eutectoid composition. Once the temperature is lowered below the eutectoid temperature, the austenite phase tends to undergo a eutectoid transformation (γ to α + Fe3C). The resultant microstructure, known as pearlite, comprises alternate lamellae of cementite and ferrite. Subsequent to casting, the alloy was normalised (annealed) just below the eutectoid temperature, in order to induce the carbides to take a spherical appearance, which results in the steel becoming softer and more ductile. This is known as spheroidisation. The changes to the morphology of the cementite are visible in this micrograph, but are clearer at higher magnification (see micrograph 267).

Subjects

alloy | carbon | iron | metal | normalising | spheroidised | steel | doitpoms | university of cambridge | micrograph | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Site sourced from

http://dspace.jorum.ac.uk/oai/request?verb=ListRecords&metadataPrefix=oai_dc

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Fe, C 0.8 (wt%) steel, eutectoid transformation, spheroidised

Description

This steel is of the eutectoid composition. Once the temperature is lowered below the eutectoid temperature, the austenite phase tends to undergo a eutectoid transformation (γ to α + Fe3C). The resultant microstructure, known as pearlite, comprises alternate lamellae of cementite and ferrite. Subsequent to casting, the alloy was normalised (annealed) just below the eutectoid temperature, in order to induce the carbides to take a spherical appearance, which results in the steel becoming softer and more ductile. This is known as spheroidisation. The changes to the morphology of the cementite, compared with the normal plate-like appearance in freshly-formed pearlite, are clearly visible in this micrograph.

Subjects

alloy | carbon | iron | metal | normalising | spheroidised | steel | doitpoms | university of cambridge | micrograph | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Site sourced from

http://dspace.jorum.ac.uk/oai/request?verb=ListRecords&metadataPrefix=oai_dc

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Fe, C 0.8 (wt%) steel, eutectoid transformation, spheroidised

Description

This steel is of the eutectoid composition. Once the temperature is lowered below the eutectoid temperature, the austenite phase tends to undergo a eutectoid transformation (? to ? + Fe3C). The resultant microstructure, known as pearlite, comprises alternate lamellae of cementite and ferrite. Subsequent to casting, the alloy was normalised (annealed) just below the eutectoid temperature, in order to induce the carbides to take a spherical appearance, which results in the steel becoming softer and more ductile. This is known as spheroidisation. The changes to the morphology of the cementite cannot be seen clearly in this micrograph, but they are discernible at higher magnification (see micrographs 266 and 267).

Subjects

alloy | carbon | iron | metal | normalising | spheroidised | steel | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Site sourced from

http://core.materials.ac.uk/rss/doitpoms_images.xml

Attribution

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Fe, C 0.8 (wt%) steel, eutectoid transformation, spheroidised

Description

This steel is of the eutectoid composition. Once the temperature is lowered below the eutectoid temperature, the austenite phase tends to undergo a eutectoid transformation (? to ? + Fe3C). The resultant microstructure, known as pearlite, comprises alternate lamellae of cementite and ferrite. Subsequent to casting, the alloy was normalised (annealed) just below the eutectoid temperature, in order to induce the carbides to take a spherical appearance, which results in the steel becoming softer and more ductile. This is known as spheroidisation. The changes to the morphology of the cementite are visible in this micrograph, but are clearer at higher magnification (see micrograph 267).

Subjects

alloy | carbon | iron | metal | normalising | spheroidised | steel | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Site sourced from

http://core.materials.ac.uk/rss/doitpoms_images.xml

Attribution

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Fe, C 0.8 (wt%) steel, eutectoid transformation, spheroidised

Description

This steel is of the eutectoid composition. Once the temperature is lowered below the eutectoid temperature, the austenite phase tends to undergo a eutectoid transformation (? to ? + Fe3C). The resultant microstructure, known as pearlite, comprises alternate lamellae of cementite and ferrite. Subsequent to casting, the alloy was normalised (annealed) just below the eutectoid temperature, in order to induce the carbides to take a spherical appearance, which results in the steel becoming softer and more ductile. This is known as spheroidisation. The changes to the morphology of the cementite, compared with the normal plate-like appearance in freshly-formed pearlite, are clearly visible in this micrograph.

Subjects

alloy | carbon | iron | metal | normalising | spheroidised | steel | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Site sourced from

http://core.materials.ac.uk/rss/doitpoms_images.xml

Attribution

Click to get HTML | Click to get attribution | Click to get URL

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