Searching for bainite : 14 results found | RSS Feed for this search

1

TRIP steel annealed at 775°C for 5 mins and then hold at 400°C for 150s for austenite stabilization

Description

The steel microstructure reveals clearly the retained austenite as white, martensite as straw-coloured constituents, bainite can be identified with needle-shaped austenites (there is no carbide present due to the addition of Si). Many martensite-austenite constituents can be found in the microstructure which is revealed because of the tint etching. This is not possible with any other reported ethants/etching techniques for TRIP steels. The microstructure does not show presence of any carbides.

Subjects

alloy | bainite | metal | retained austenite | trip 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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TRIP steel annealed at 775°C for 5 mins and then hold at 400°C for 40s for austenite stabilization

Description

The microstructure shows martensite (straw-coloured), retained austenite (white) and some M-A constituents. Martensite volume fraction is higher than the steel which was hold for 150s at 400°C and cooled. Since the austenite is low in C-content for such a low holding time at 400°C, most of the austenite is transformed to martensite during cooling from 400°C to room temperature.

Subjects

alloy | bainite | metal | retained austenite | trip 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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Austenitised and isothermally transformed steel.

Description

Steel, austenitised at 1200 centigrade for 120 s and then transformed isothermally at 350 centigrade for 2000 s before cooling to room temperature. The specimen was polished prior to transformation. This atomic force microscope image shows the displacements caused by the formation of bainite.

Subjects

alloy | bainite | metal | shape deformation | steel | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

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

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High carbon steel

Description

Treated at 1000 centigrade for 15 minutes and then isothermally treated at 200 centigrade for 4 days, start of bainite transformation. This micrograph shows a lath of bainitic-ferrite growing into a grain of austenite and the dislocation field generated by the displacive transformation. Reference: Proceedings of International Conference on Martensitic Transformations (ICOMAT '02), Helsinki, Finland, 2002.

Subjects

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

License

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

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High carbon steel

Description

Treated at 1000 centigrade for 15 minutes and then isothermally treated at 250 centigrade for 25 days, end of bainite transformation. This micrograph shows laths of bainitic-ferrite and the austenite thin films trapped between them (dark phase). Reference: Proceedings of International Conference on Martensitic Transformations (ICOMAT '02), Helsinki, Finland, 2002.

Subjects

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

License

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

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C for 5 mins and then hold at 400C for 150s for austenite stabilization

Description

The steel microstructure reveals clearly the retained austenite as white, martensite as straw-coloured constituents, bainite can be identified with needle-shaped austenites (there is no carbide present due to the addition of Si). Many martensite-austenite constituents can be found in the microstructure which is revealed because of the tint etching. This is not possible with any other reported ethants/etching techniques for TRIP steels. The microstructure does not show presence of any carbides.

Subjects

alloy | bainite | metal | retained austenite | TRIP steel | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

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

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C for 5 mins and then hold at 400C for 40s for austenite stabilization

Description

The microstructure shows martensite (straw-coloured), retained austenite (white) and some M-A constituents. Martensite volume fraction is higher than the steel which was hold for 150s at 400C and cooled. Since the austenite is low in C-content for such a low holding time at 400C, most of the austenite is transformed to martensite during cooling from 400C to room temperature.

Subjects

alloy | bainite | metal | retained austenite | TRIP steel | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

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

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Fe, C 0.4 (wt%) steel, slow quenched

Description

Medium carbon steel that has been austenitised and subsequently quenched. If the quench is insufficiently rapid bainite is formed instead of martensite. This sample was taken from the centre of a quenched item. Cooling rates in the centre are slower and hence the formation of the bainite that can be observed.

Subjects

alloy | bainite | carbon | iron | metal | quenching | 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 0.4 (wt%) steel, slow quenched

Description

Medium carbon steel that has been austenitised and subsequently quenched. If the quench is insufficiently rapid bainite is formed instead of martensite. This sample was taken from the centre of a quenched item. Cooling rates in the centre are slower and hence the formation of the bainite that can be observed.

Subjects

alloy | bainite | carbon | iron | metal | quenching | 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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Austenitised and isothermally transformed steel.

Description

Steel, austenitised at 1200 centigrade for 120 s and then transformed isothermally at 350 centigrade for 2000 s before cooling to room temperature. The specimen was polished prior to transformation. This atomic force microscope image shows the displacements caused by the formation of bainite.

Subjects

alloy | bainite | metal | shape deformation | 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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http://dspace.jorum.ac.uk/oai/request?verb=ListRecords&metadataPrefix=oai_dc

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High carbon steel

Description

Treated at 1000 centigrade for 15 minutes and then isothermally treated at 200 centigrade for 4 days, start of bainite transformation. This micrograph shows a lath of bainitic-ferrite growing into a grain of austenite and the dislocation field generated by the displacive transformation. Reference: Proceedings of International Conference on Martensitic Transformations (ICOMAT '02), Helsinki, Finland, 2002.

Subjects

alloy | bainite | carbon | iron | metal | 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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High carbon steel

Description

Treated at 1000 centigrade for 15 minutes and then isothermally treated at 250 centigrade for 25 days, end of bainite transformation. This micrograph shows laths of bainitic-ferrite and the austenite thin films trapped between them (dark phase). Reference: Proceedings of International Conference on Martensitic Transformations (ICOMAT '02), Helsinki, Finland, 2002.

Subjects

alloy | bainite | carbon | iron | metal | 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 0.4 (wt%) steel, slow quenched

Description

Medium carbon steel that has been austenitised and subsequently quenched. If the quench is insufficiently rapid bainite is formed instead of martensite. This sample was taken from the centre of a quenched item. Cooling rates in the centre are slower and hence the formation of the bainite that can be observed.

Subjects

alloy | bainite | carbon | iron | metal | quenching | 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 0.4 (wt%) steel, slow quenched

Description

Medium carbon steel that has been austenitised and subsequently quenched. If the quench is insufficiently rapid bainite is formed instead of martensite. This sample was taken from the centre of a quenched item. Cooling rates in the centre are slower and hence the formation of the bainite that can be observed.

Subjects

alloy | bainite | carbon | iron | metal | quenching | 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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