Dehnratenabhängige Beschreibung der Fließkurven für erhoöhte Temperaturen
-
Essam El-Magd
and
Christoph Treppmann
Abstract
Die kontinuierliche Beschreibung des Werkstoffverhaltens in großen Bereichen der Dehngeschwindigkeit (10–3–104 s–1) bei gleichzeitig hohen Temperaturen erfordert die Kombination verschiedener Formulierungen für die unterschiedlichen physikalischen Vorgänge während der Verformung. Im Bereich hoher Temperaturen bei gleichzeitig niedrigen Dehnraten sind Kriechprozesse maßgeblich, für den Bereich erhöhter Dehnraten (< 103 s–1) bei niedrigeren Temperaturen findet plastisches Fließen statt. Im dynamischen Bereich (>103 s–1) kann linear viskoses Werkstoffverhalten angenommen werden. Der Übergang zwischen diesen Prozessen wird mit Hilfe einer kontinuierlichen Funktion beschrieben. Anhand von Fließkurven an AA7075, Ck45N und TiA16V4, die bei Dehnraten von 10–3–104 s–1 und Temperaturen von Raumtemperatur bis zu 900 °C ermittelt wurden, wird eine neue Beschreibung verifiziert, die diese drei Verformungsmechanismen in einer kombinierten Formulierung berücksichtigt.
Abstract
In order to give a continuous description of the flow behaviour in a wide range of strain rate (10–3–104 s–1) and temperature, a combination of formulations for the different physical effects during the plastic deformation process is necessary. In the range of high temperatures and low strain rates, a creep law is used which is added to the plastic flow behaviour (< 103 s–1). In the range of dynamic deformation (> 103 s–1), linear viscous behaviour can describe the mechanical attitude. A transition function is used between these processes. This new description is verified with measured flow curves for AA7075, Ck45N and TiA16V4 at strain rates between 10–3 s–1 and 104 s–1and at temperatures between room temperature and 900 °C.
Literatur
1 Swift, H.W.: J. Mech. Phys. Solids 1 (1952) 18.10.1016/0022-5096(52)90002-1Search in Google Scholar
2 Kocks, U.F.; Mecking, H.: Acta. Metall. 29 (1981) 1865.10.1016/0001-6160(81)90112-7Search in Google Scholar
3 Voce, E.: J. Inst. Metals 74 (1948) 537.Search in Google Scholar
4 Petch, N.J.: Phil. Mag. 8 (1958) 1089.10.1080/14786435808237038Search in Google Scholar
5 Taylor, G.I.; Quinney, H.: Proc. Roy. Soc. Lond. A 413 (1934) 307.Search in Google Scholar
6 El-Magd, E.: J. Physique III, 4 (1994) C8–149.Search in Google Scholar
7 Treppmann, C.: Dr.-Ing.-Dissertation, RWTH Aachen (2001).Search in Google Scholar
8 Ludwik, P.: Elemente der Technologischen Mechanik, Springer Verlag, Berlin (1909).10.1007/978-3-662-40293-1Search in Google Scholar
9 Hollomon, J.: Trans. AIME 162 (1945) 268.Search in Google Scholar
© 2001 Carl Hanser Verlag, München
Articles in the same Issue
- Frontmatter
- Editorial
- Günter Lange 65 Years
- Aufsätze/Articles
- Deformation and Microstructure of Titanium Chips and Workpiece
- Eigenspannungsabbau in zügig und zyklisch beanspruchten Schweißverbindungen
- Bruchmechanische Nachweise zur Stahlgütewahl für moderne Feinkornbaustähle
- Experimental Analysis of the Interaction of “Hot” and “Cold” Volume Elements during Thermal Fatigue of a Cooled Component Made from AISI 3161 Steel
- Microstructure and Cyclic Deformation Behavior of Wheel and Tire Steels in Technically Relevant Heat Treatments
- Dehnratenabhängige Beschreibung der Fließkurven für erhoöhte Temperaturen
- Ein einfaches Modell für die Kinetik der Rekristallisation
- Determination of the Elastic Modulus of Wear Resistant Coatings by Quantitative Acoustic Microscopy
- Processing, Microstructure and Properties of Nb–TiO2 ODS Materials for Surgical Implants
- Influence of Surface Treatment on the Pitting Corrosion Behaviour of High Alloyed Stainless Steels in a Chloride Solution
- Unfall durch Drahtseilriss in einer Tunnelbaustelle
- Synthesis of Nanocrystalline B2 Structured (Ru, Ir) Al in the Ternary Ru–Al–Ir System by Mechanical Alloying and its Thermal Stability
- Preparation of Ca-α-sialon Ceramics with Compositions along the Si3N4-1/2 Ca3N2:3AIN Line
- SiC–Si3N4 Nanocomposite Prepared by the Addition of SiO2 + C
- Ceramics in the Si3N4–ZrO2–CeO2 System: Phase Composition Changes and Properties
- The Al–Ca System, Part 1: Experimental Investigation of Phase Equilibria and Crystal Structures
- The Al–Ca System, Part 2: Calorimetrie Measurements and Thermodynamic Assessment
- Phase Relationships of the Gd-Zn System
- Ableitung des Kristallisationspfades in ternären Gusslegierungen
- Bildanalyse komplexer Werkstoffgefüge durch Texturanalyse und Korrelation mit den Eigenschaften durch neuronale Netze
- Grain Growth in the Nanocrystalline W–Cu and Cu–Pb Composite Powders Prepared by Mechanical Alloying
- Toughening and Strengthening Response in Ni3Al-Bonded Titanium Carbide Cermets
- Creep Behavior of γ-TiAl-Based Alloys with Fully Lamellar Microstore
- Elevated Temperature Deformation of P/M Dispersion - Strengthened Copper and Aluminium
- Evolution of the Microstructure during Hot Working of Gamma-Based TiAl Alloys
- Interface Motion of β-Silicon Nitride in a Liquid Phase
- Internal Friction and Creep of Titanium Aluminides with Different Microstructure
- Mitteilungen/Notifications
- Personen
- Conferences
Articles in the same Issue
- Frontmatter
- Editorial
- Günter Lange 65 Years
- Aufsätze/Articles
- Deformation and Microstructure of Titanium Chips and Workpiece
- Eigenspannungsabbau in zügig und zyklisch beanspruchten Schweißverbindungen
- Bruchmechanische Nachweise zur Stahlgütewahl für moderne Feinkornbaustähle
- Experimental Analysis of the Interaction of “Hot” and “Cold” Volume Elements during Thermal Fatigue of a Cooled Component Made from AISI 3161 Steel
- Microstructure and Cyclic Deformation Behavior of Wheel and Tire Steels in Technically Relevant Heat Treatments
- Dehnratenabhängige Beschreibung der Fließkurven für erhoöhte Temperaturen
- Ein einfaches Modell für die Kinetik der Rekristallisation
- Determination of the Elastic Modulus of Wear Resistant Coatings by Quantitative Acoustic Microscopy
- Processing, Microstructure and Properties of Nb–TiO2 ODS Materials for Surgical Implants
- Influence of Surface Treatment on the Pitting Corrosion Behaviour of High Alloyed Stainless Steels in a Chloride Solution
- Unfall durch Drahtseilriss in einer Tunnelbaustelle
- Synthesis of Nanocrystalline B2 Structured (Ru, Ir) Al in the Ternary Ru–Al–Ir System by Mechanical Alloying and its Thermal Stability
- Preparation of Ca-α-sialon Ceramics with Compositions along the Si3N4-1/2 Ca3N2:3AIN Line
- SiC–Si3N4 Nanocomposite Prepared by the Addition of SiO2 + C
- Ceramics in the Si3N4–ZrO2–CeO2 System: Phase Composition Changes and Properties
- The Al–Ca System, Part 1: Experimental Investigation of Phase Equilibria and Crystal Structures
- The Al–Ca System, Part 2: Calorimetrie Measurements and Thermodynamic Assessment
- Phase Relationships of the Gd-Zn System
- Ableitung des Kristallisationspfades in ternären Gusslegierungen
- Bildanalyse komplexer Werkstoffgefüge durch Texturanalyse und Korrelation mit den Eigenschaften durch neuronale Netze
- Grain Growth in the Nanocrystalline W–Cu and Cu–Pb Composite Powders Prepared by Mechanical Alloying
- Toughening and Strengthening Response in Ni3Al-Bonded Titanium Carbide Cermets
- Creep Behavior of γ-TiAl-Based Alloys with Fully Lamellar Microstore
- Elevated Temperature Deformation of P/M Dispersion - Strengthened Copper and Aluminium
- Evolution of the Microstructure during Hot Working of Gamma-Based TiAl Alloys
- Interface Motion of β-Silicon Nitride in a Liquid Phase
- Internal Friction and Creep of Titanium Aluminides with Different Microstructure
- Mitteilungen/Notifications
- Personen
- Conferences
