Precipitation Trends in Highly Alloyed Austenitic Stainless Steels
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Rachel F A. Jargelius-Pettersson
Abstract
The influence of alloying levels in the range 0.01 to 0.5 % nitrogen, 4.5 to 6 % molybdenum and 0 to 10 % manganese on precipitation behaviour has been evaluated for austenitic stainless steels with a base composition of 20% Cr, 18 or 25 % Ni and < 0.02 % C. Both precipitation kinetics and the equilibrium conditions have been investigated. Precipitating phases include a number of intermetallic phases in addition to nitrides, silicides and carbides; some of these were transient phases which occurred only in the early stages of precipitation and were not present in the equilibrium structure. Experimental results are compared with calculations of elemental activities and the driving force for precipitation of different phases.
Abstract
Der Einfluß der Legierungselemente Stickstoff, Molybdän und Mangan auf das Ausscheidungsverhalten in austenitischen rostfreien Stählen der Zusammensetzung 20% Cr, 18 oder 25 % Ni und < 0.02 % C wurde untersucht. Die Legierungsanteile variierten in den folgenden Bereichen: Stickstoff 0.01 bis 0.5%, Molybdän 4.5 bis 6% und Mangan 0 bis 10 %. Die Ausscheidungskinetik, sowie die Gleichgewichtszustände wurden untersucht. Die untersuchten Phasen waren intermetallische Phasen, sowie Nitride, Silizide und Karbide. Einige Phasen waren nicht stabil und traten nur zu Ausscheidungsbeginn auf. Im Gleichge- wichtsgefäge waren diese nicht mehr vorhanden. Die experimentellen Resultate wurden mit den berechneten Elementaktivitäten und Gibbs’schen Energie verglichen.
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The financial support for this work by Avesta Sheffield AB, AB Sandvik Steel, Fagersta Stainless AB, ABB Powdermet (now Powdermet Sweden AB) and the Swedish Board for Industrial and Technical Development (NUTEK) is gratefully acknowledged. Thanks are also expressed to Avesta Sheffield AB and AB Sandvik Steel for the preparation of the alloys, the Naval Postgraduate School, Monterey, USA for the provision of electron microscopy facilities and Staffan Hertzman for advice on the use of ThermoCalc.
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© 1998 Carl Hanser Verlag, München
Artikel in diesem Heft
- Frontmatter
- Aufsätze
- Thermal Analysis of Solid State Amorphization: Predicted and Measured Reaction Enthalpies and Reaction Kinetics
- Precipitation Trends in Highly Alloyed Austenitic Stainless Steels
- Condensed Phase Equilibria in the Mo-Ga-N System at 800 °C
- Interdiffusion in the β Mo–Ti Solid Solution at High Temperatures
- Nitride Phase Equilibria in the Fe–Cr–Mn–N System at 1273 and 1073 K
- The Solubility of Nickel in Sodium Calculated from Corrosion Tests in Flowing Liquid Metal
- Influence of Heterogeneous Dislocation Arrangements on X-ray Diffraction Profiles Measured on Cyclically Deformed Nickel Single Crystals
- Change of Crystal Orientation in Straining and Dislocation Glide Systems
- On the High Temperature Creep Behavior of Two Rapidly Solidified Dispersion Strengthened Al–Fe–V–Si Materials
- Kinetics of Ferrite to Austenite Transformation in a High Strength Low Alloy Steel Containing Nb
- Mechanical Alloying of Zn-rich Zn–Al–Cu Alloys
- Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
- Personen
- Terminkalender
Artikel in diesem Heft
- Frontmatter
- Aufsätze
- Thermal Analysis of Solid State Amorphization: Predicted and Measured Reaction Enthalpies and Reaction Kinetics
- Precipitation Trends in Highly Alloyed Austenitic Stainless Steels
- Condensed Phase Equilibria in the Mo-Ga-N System at 800 °C
- Interdiffusion in the β Mo–Ti Solid Solution at High Temperatures
- Nitride Phase Equilibria in the Fe–Cr–Mn–N System at 1273 and 1073 K
- The Solubility of Nickel in Sodium Calculated from Corrosion Tests in Flowing Liquid Metal
- Influence of Heterogeneous Dislocation Arrangements on X-ray Diffraction Profiles Measured on Cyclically Deformed Nickel Single Crystals
- Change of Crystal Orientation in Straining and Dislocation Glide Systems
- On the High Temperature Creep Behavior of Two Rapidly Solidified Dispersion Strengthened Al–Fe–V–Si Materials
- Kinetics of Ferrite to Austenite Transformation in a High Strength Low Alloy Steel Containing Nb
- Mechanical Alloying of Zn-rich Zn–Al–Cu Alloys
- Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
- Personen
- Terminkalender
