On the High Temperature Creep Behavior of Two Rapidly Solidified Dispersion Strengthened Al–Fe–V–Si Materials
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Fernando Carreño
Abstract
The high temperature creep behavior of two rolled Al–Fe–V–Si dispersion strengthened materials has been studied by means of tensile tests. The microstructure consisted of 16 % and 36 % volume fraction of submicron dispersoids evenly distributed in the aluminum matrix. High apparent stress exponents from 10 to 38, and high apparent activation energies of up to 700 kJ/mol, were observed. A threshold stress - like creep behavior was never observed at any temperature. The creep data was analyzed using Rösler and Arzt’s detachment creep model. The predictions at high temperatures from the model are not accurate, predicting higher creep rates and lower stress exponents than those experimentally measured. A modified version of the detachment creep equation is proposed for predicting the creep behavior of dispersion strengthened materials taking into account the constancy of the microstructure during deformation.
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The authors gratefully acknowledge the support of the Comisión Interministerial de Ciencia y Tecnología (CICYT) under Grant No. MAT94/ 0888. Thanks are given to Dr. P. S. Gilman and Allied-Signal Inc. for providing the material and for valuable information.
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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
