Phase and microstructure selection in peritectic alloys under high G-V ratio
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Stephane Dobler
Abstract
A new model for the case of a superposition of a phase transformation and a microstructure transition from columnar plane front to equiaxed dendritic growth for peritectic alloys is presented. This model is applied to Fe–Ni alloys where a phase transition from γ to δ takes place when the solute content decreases. The results of the model are compared with predictions of the nucleation constitutional undercooling model. They show that the peritectic two-(solid) phase region is restricted and may completely disappear depending on nucleation undercooling and dendrite growth kinetics.
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The authors are grateful to R. Trivedi for helpful discussion. This research has been supported by the European Space Agency (ESA) and by Swissmetal, Dornach.
References
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© 2004 Carl Hanser Verlag, München
Artikel in diesem Heft
- 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
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- In-situ investigation of strain relaxation in an Al/Si–MMC using high energy synchrotron radiation
- Sigma-phase in duplex-stainless steels
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- 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
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Artikel in diesem Heft
- 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
