The morphology and crystallography of lath martensite in Fe-C alloys

S. Morito; H. Tanaka; R. Konishi; T. Furuhara; T. Maki

doi:10.1016/S1359-6454(02)00577-3

The morphology and crystallography of lath martensite in Fe-C alloys

S. Morito, H. Tanaka, R. Konishi, T. Furuhara, T. Maki

IMR - Materials Design Division

Research output: Contribution to journal › Article › peer-review

1070 Citations (Scopus)

Abstract

The morphology and crystallography of lath martensite in Fe-C alloys containing various carbon contents from 0.0026 to 0.61% were studied by analyzing electron back scattered diffraction patterns in scanning electron microscopy and Kikuchi diffraction patterns in transmission electron microscopy. As carbon content increases, the sizes of both packet and block decrease. In low carbon steels (0.0026-0.38%C), a block which is observed as having different contrasts under optical microscopy contains two groups (sub-blocks) of laths which are of two K-S variants with a misorientation of about 10 degrees. On the other hand, in the high carbon alloy (0.61%C), a block consists of laths of a single K-S variant.

Original language	English
Pages (from-to)	1789-1799
Number of pages	11
Journal	Acta Materialia
Volume	51
Issue number	6
DOIs	https://doi.org/10.1016/S1359-6454(02)00577-3
Publication status	Published - 2003 Apr 2

Keywords

Electron back scattered diffraction pattern
Iron-carbon alloy
Kikuchi diffraction pattern
Lath martensite
Morphology and crystallography

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10.1016/S1359-6454(02)00577-3

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title = "The morphology and crystallography of lath martensite in Fe-C alloys",

abstract = "The morphology and crystallography of lath martensite in Fe-C alloys containing various carbon contents from 0.0026 to 0.61% were studied by analyzing electron back scattered diffraction patterns in scanning electron microscopy and Kikuchi diffraction patterns in transmission electron microscopy. As carbon content increases, the sizes of both packet and block decrease. In low carbon steels (0.0026-0.38%C), a block which is observed as having different contrasts under optical microscopy contains two groups (sub-blocks) of laths which are of two K-S variants with a misorientation of about 10 degrees. On the other hand, in the high carbon alloy (0.61%C), a block consists of laths of a single K-S variant.",

keywords = "Electron back scattered diffraction pattern, Iron-carbon alloy, Kikuchi diffraction pattern, Lath martensite, Morphology and crystallography",

author = "S. Morito and H. Tanaka and R. Konishi and T. Furuhara and T. Maki",

note = "Funding Information: The authors wish to thank Dr. S. Zaefferer at the Max Planck Institute for Iron Research (D{\"u}sseldorf, Germany) for allowing us to use the program for on/off-line crystallographic analysis on TEM. The financial supports of the Iron and Steel Institute of Japan and the Ministry of Education, Science and Culture through a Grand-in-Aid for Encouragement of Young Scientists (B) No.14750575 are gratefully acknowledged.",

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AU - Morito, S.

AU - Tanaka, H.

AU - Konishi, R.

AU - Furuhara, T.

AU - Maki, T.

N1 - Funding Information: The authors wish to thank Dr. S. Zaefferer at the Max Planck Institute for Iron Research (Düsseldorf, Germany) for allowing us to use the program for on/off-line crystallographic analysis on TEM. The financial supports of the Iron and Steel Institute of Japan and the Ministry of Education, Science and Culture through a Grand-in-Aid for Encouragement of Young Scientists (B) No.14750575 are gratefully acknowledged.

PY - 2003/4/2

Y1 - 2003/4/2

N2 - The morphology and crystallography of lath martensite in Fe-C alloys containing various carbon contents from 0.0026 to 0.61% were studied by analyzing electron back scattered diffraction patterns in scanning electron microscopy and Kikuchi diffraction patterns in transmission electron microscopy. As carbon content increases, the sizes of both packet and block decrease. In low carbon steels (0.0026-0.38%C), a block which is observed as having different contrasts under optical microscopy contains two groups (sub-blocks) of laths which are of two K-S variants with a misorientation of about 10 degrees. On the other hand, in the high carbon alloy (0.61%C), a block consists of laths of a single K-S variant.

AB - The morphology and crystallography of lath martensite in Fe-C alloys containing various carbon contents from 0.0026 to 0.61% were studied by analyzing electron back scattered diffraction patterns in scanning electron microscopy and Kikuchi diffraction patterns in transmission electron microscopy. As carbon content increases, the sizes of both packet and block decrease. In low carbon steels (0.0026-0.38%C), a block which is observed as having different contrasts under optical microscopy contains two groups (sub-blocks) of laths which are of two K-S variants with a misorientation of about 10 degrees. On the other hand, in the high carbon alloy (0.61%C), a block consists of laths of a single K-S variant.

KW - Electron back scattered diffraction pattern

KW - Iron-carbon alloy

KW - Kikuchi diffraction pattern

KW - Lath martensite

KW - Morphology and crystallography

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JO - Acta Materialia

JF - Acta Materialia

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The morphology and crystallography of lath martensite in Fe-C alloys

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Keywords

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