Charakterisierung von Dual-Phasen- und TRIP-Stählen mittels Nanohärte und Röntgendiffraktometrie
-
Johann Angeli
and
Albert C. Kneissl
Abstract
Es wurden die Härten für die Phasen Ferrit, Martensit und angelassener Martensit an DP-Stählen, sowie für Ferrit und Bainit an TRIP-Stählen ermittelt. Die Ferrithärten von DP- und TRIP-Stählen unterscheiden sich und liegen bei 3,0 bzw. 3,7 GPa. Angelassener Martensit zeigt ca. 6,5 GPa, nichtangelassener Martensit, je nach Kohlenstoffgehalt, ca. 8,5 bzw. 11,5 GPa. Bainit in TRIP-Stählen hat eine Härte von etwa 7,5 GPa.
Über Röntgendiffraktometrie wurden die Volumenanteile von Restaustenit und dessen Kohlenstoffgehalt über die Gitteraufweitung bestimmt. Die Restaustenitanteile betragen ca. 4 Vol.-% bei der DP-Variante und ca. 7 Vol.-% bis 14 Vol.-% bei den TRIP-Varianten. Der Kohlenstoff im Restaustenit wurde an den TRIP-Varianten mit 0,9 Ma-% bis 1,1 Ma-% ermittelt. Dabei ist der Einfluss der Legierungselemente Al und Si auf die Gitteraufweitung zu berücksichtigen.
Abstract
For DP and TRIP steels, the nanohardness of ferrite, martensite, tempered martensite and bainite was measured. The lowest values showed ferrite, the differences detected in the hardness of martensite depend on the carbon content. Bainite in TRIP steels is slightly harder than tempered martensite in DP steel.
The amount of retained austenite was measured by XRD methods. Values between 4 Vol.-% up to 14 Vol.-% were shown. According to lattice extension of austenite, the interstitial carbon content was calculated. Amounts between 0.9 and 1.1 mass percent carbon were detected. The influence of the substitutional elements like Al and Si has to be taken into account to get correct carbon contents.
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© 2004 Carl Hanser Verlag, München
Articles in the same Issue
- Frontmatter
- Editorial
- 50 Jahre Metallkunde-Kolloquium am Arlberg
- Articles Basic
- Microstructure and mechanical properties of Si and YN doped powder metallurgical tantalum
- Mechanical model for the deformation of the wood cell wall
- Physical metallurgy of high Nb-containing TiAl alloys
- Phase and microstructure selection in peritectic alloys under high G-V ratio
- Austenitic stainless steels of high strength and ductility
- Articles Applied
- Charakterisierung von Dual-Phasen- und TRIP-Stählen mittels Nanohärte und Röntgendiffraktometrie
- Mechanische Zuverlässigkeit von keramischen Kaltleiterbauelementen – Möglichkeiten zur Verbesserung
- Physical and materials aspects of photonic crystals for microwaves and millimetre waves
- In-situ investigation of strain relaxation in an Al/Si–MMC using high energy synchrotron radiation
- Sigma-phase in duplex-stainless steels
- Evolution of texture in Alloy 80A during initial ingot breakdown
- Characterisation of precipitates in a stainless maraging steel by three-dimensional atom probe and small-angle neutron scattering
- Modifikation von Titanlegierungen für medizinische Anwendungen
- Residual stresses in forged IN718 turbine discs
- Notifications/Mitteilungen
- Personal/Personelles
Articles in the same Issue
- Frontmatter
- Editorial
- 50 Jahre Metallkunde-Kolloquium am Arlberg
- Articles Basic
- Microstructure and mechanical properties of Si and YN doped powder metallurgical tantalum
- Mechanical model for the deformation of the wood cell wall
- Physical metallurgy of high Nb-containing TiAl alloys
- Phase and microstructure selection in peritectic alloys under high G-V ratio
- Austenitic stainless steels of high strength and ductility
- Articles Applied
- Charakterisierung von Dual-Phasen- und TRIP-Stählen mittels Nanohärte und Röntgendiffraktometrie
- Mechanische Zuverlässigkeit von keramischen Kaltleiterbauelementen – Möglichkeiten zur Verbesserung
- Physical and materials aspects of photonic crystals for microwaves and millimetre waves
- In-situ investigation of strain relaxation in an Al/Si–MMC using high energy synchrotron radiation
- Sigma-phase in duplex-stainless steels
- Evolution of texture in Alloy 80A during initial ingot breakdown
- Characterisation of precipitates in a stainless maraging steel by three-dimensional atom probe and small-angle neutron scattering
- Modifikation von Titanlegierungen für medizinische Anwendungen
- Residual stresses in forged IN718 turbine discs
- Notifications/Mitteilungen
- Personal/Personelles
