Characterization of the carbides and the martensite phase in powder-metallurgy high-speed steel

A microstructural characterization of the powder-metallurgy high-speed-steel S390 Microclean was performed based on an elemental distribution of the carbide phase as well as crystallographic analyses. The results showed that there were two types of carbides present: vanadium-rich carbides, which wer...

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Veröffentlicht in:Materials characterization 2010-04, Vol.61 (4), p.452-458
Hauptverfasser: Godec, Matjaž, Batič, Barbara Šetina, Mandrino, Djordje, Nagode, Aleš, Leskovšek, Vojteh, Škapin, Srečo D., Jenko, Monika
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container_end_page 458
container_issue 4
container_start_page 452
container_title Materials characterization
container_volume 61
creator Godec, Matjaž
Batič, Barbara Šetina
Mandrino, Djordje
Nagode, Aleš
Leskovšek, Vojteh
Škapin, Srečo D.
Jenko, Monika
description A microstructural characterization of the powder-metallurgy high-speed-steel S390 Microclean was performed based on an elemental distribution of the carbide phase as well as crystallographic analyses. The results showed that there were two types of carbides present: vanadium-rich carbides, which were not chemically homogeneous and exhibited a tungsten-enriched or tungsten-depleted central area; and chemically homogeneous tungsten-rich M 6C-type carbides. Despite the possibility of chemical inhomogenities, the crystallographic orientation of each of the carbides was shown to be uniform. Using electron backscatter diffraction the vanadium-rich carbides were determined to be either cubic VC or hexagonal V 6C 5, while the tungsten-rich carbides were M 6C. The electron backscatter diffraction results were also verified using X-ray diffraction. Several electron backscatter diffraction pattern maps were acquired in order to define the fraction of each carbide phase as well as the amount of martensite phase. The fraction of martensite was estimated using band-contrast images, while the fraction of carbides was calculated using the crystallographic data.
doi_str_mv 10.1016/j.matchar.2010.02.003
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source Elsevier ScienceDirect Journals
subjects AES
AUGER ELECTRON SPECTROSCOPY
BACKSCATTERING
Carbides
Cross-disciplinary physics: materials science
rheology
Crystallography
CUBIC LATTICES
Diffraction
EBSD
EDS
Electron back scatter diffraction
ELECTRON DIFFRACTION
Exact sciences and technology
HEXAGONAL LATTICES
Inhomogeneities
MARTENSITE
MATERIALS SCIENCE
Mathematical analysis
MICROSTRUCTURE
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
POWDER METALLURGY
Solidification
STEELS
Tool steel
TUNGSTEN
VANADIUM
VANADIUM CARBIDES
X-RAY DIFFRACTION
XRD
title Characterization of the carbides and the martensite phase in powder-metallurgy high-speed steel
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